Laboratory of Materials Science of Shape Memory Alloys
Litovchenko Igor Yurievich
Doctor of Physical and Mathematical Sciences
e-mail: litovchenko@ispms.ru
tel: (83822) 286-900
Brief historical background about the department
The Laboratory of Materials Science of Shape Memory Alloys was opened within the Institute’s structure within the Department of Mechanics of Environment with a structure on September 2, 1991 in accordance with Order No. 104-k dated September 2, 1991. The laboratory was opened on the basis of the team of the Laboratory of Electronic Structures of the Siberian Physics and Technology Institute (SPTI) at Tomsk State University. A.I. was appointed as the head of the laboratory and subsequently elected through a competition. Lotkov. The Laboratory of Electronic Structures at SFTI was organized by Professor V.E. Panin and was headed by him until 1979, and from 1979 to 1991 the head of the laboratory was Ph.D. A.I. Lotkov.
Areas of research, directions of fundamental research
- the physical nature of thermoelastic martensitic transformations and the phenomena that precede them;
- development of scientific foundations for the creation of modified surface layers, including nanostructured ones, with predetermined properties in alloys with a shear-unstable matrix using nano- and microsecond pulsed effects of ion and electron beams of low and medium energies;
- mechanisms and technologies for the formation of volumetric submicrocrystalline and nanostructural states in alloys based on titanium nickelide; patterns of martensitic transformations and inelastic properties (shape memory effects and superelasticity) in these materials;
Development and substantiation of the physical principles of engineering coatings and surface layers with an ultradisperse structure to create materials with high physical, mechanical and chemical characteristics.
Composition of the unit
Total number of 15 people, including:
- 3 Doctors of Science,
- 6 Candidates of Science,
- 2 young researchers (up to 33 years old)
List of staff members
1. Litovchenko Igor Yurievich, head. lab. , Doctor of Physical and Mathematical Sciences, Email: litovchenko@ispms.ru
2. Lotkov Alexander Ivanovich, chief researcher, doctor of physical and mathematical sciences, professor Email: lotkov@ispms.ru
3. Poletika Tamara Mikhailovna, senior researcher, doctor of physical and mathematical sciences, Email: poletm@ispms.ru
4. Grishkov Viktor Nikolaevich, senior researcher, Ph.D., Email: grish@ispms.ru
5. Girsova Svetlana Leonidovna, research scientist, candidate of physical and mathematical sciences, Email: girs@ispms.ru
6. Krukovsky Konstantin Vitalievich, research scientist, candidate of technical sciences, Email: kvk@ispms. ru
7. Mironov Yuri Petrovich, research scientist, candidate of physical and mathematical sciences, Email: myp@ispms.ru
8. Zhapova Dorzhima Yurievna, research scientist, candidate of physical and mathematical sciences, Email: dorzh@ispms.ru
9. Nadezhda Aleksandrovna Polekhina, research scientist, candidate of physical and mathematical sciences, Email: nadejda89tsk@yandex.ru
10. Almaeva Ksenia Viktorovna, junior researcher, Email: kseni_ya_almaeva@mail.ru
11. Girsova Natalya Vasilievna, leading engineer, Email: girsova@ispms.ru
12. Barmina Elena Georgievna, leading. technologist, Email: barmina@ispms.ru
13. Bobrov Dmitry Ivanovich, leader. engineer Email: chromium@gmail.com
14. Kashina Olga Nikolaevna, leading. technologist, Email: ocash@ispms.ru
The most important scientific results
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Concepts have been developed about the physical nature of martensitic transformations in titanium-based B2 intermetallic compounds: these transformations are based on the allotropic transformation of titanium under the conditions of an intermetallic compound. It has been shown that the greater the relative fraction of d-states of titanium electrons at the Fermi level in the series TiFe-TiCo-TiNi-TiAu-TiPd-TiPt and the lower the degree of hybridization of these states with the d-states of electrons of the second components, the higher the temperature of the onset of martensitic transformation at cooling of the alloy and the higher the temperature for the manifestation of shape memory and superelasticity effects.
- The patterns and features of temperature changes, the sequence and hysteresis of martensitic transformations in nonequilibrium binary and multicomponent alloys based on TiNi have been established, depending on the composition and at different stages of high- and low-temperature aging under conditions when the intermediate phase of precipitation is Ti 3 Ni 4 ; Based on these studies, physical principles were developed and methods were proposed to control the main characteristics of martensitic transformations in these alloys.
- It has been established that the implantation of metal ions into the surface layers of titanium nickelide-based alloys and pulsed exposure to them with energetic electron beams leads to the formation of nickel-free and/or nickel atom-depleted layers with a thickness of about 40-60 nm after ion beam and more than 400 nm after electron beam - radiation exposure. The physical nature of this effect is due to the formation of a nonequilibrium system of vacancy-type radiation defects in modified surface layers and different values ​​of the energies of formation and migration of vacancies on the sublattices of titanium and nickel atoms in the B2 structure, which ensures a greater diffusion mobility of nickel atoms than titanium, and their flows into deep layers from the surface when vacancies move to the surface of the samples.
- Physical principles and technologies have been developed for the formation, using a combination of low-energy pulsed ion and electron beams, of near-surface multilayer systems with predetermined properties in alloys based on titanium nickelide, each layer in which differs in chemical composition, atomic-crystalline structure and morphology.
- It has been established that modification of the surface layers of titanium nickelide implants with zirconium and molybdenum ions, as well as by electron beam treatment, effectively increases the corrosion resistance and biocompatibility of these implants; It has been shown that the structure of organic tissues formed on the surface of the implant depends on the properties of this surface.
- It has been established that the concentration of vacancy defects in titanium nickelide during severe plastic deformation reaches a value comparable to that which under normal conditions exists near the melting temperature. Based on the study of the fundamental characteristics of point defects in alloys, ideas about the structure-forming role of defects in the processes of grain structure refinement during severe plastic deformation of metal materials have been developed.
- Using multiple alternating operations of deposition of a thin Ti 60-70 Ta 40-30 (at.%) film and its liquid-phase mixing with the TiNi substrate with a microsecond low-energy high-current electron beam, surface Ti-Ta-Ni alloys with a thickness of 1 to 3 Ојm are formed. Surface Ti-Ta-Ni alloys (PS) are depleted in nickel and have a depth-gradient amorphous-nanocrystalline structure, consisting of several sublayers that differ in phase composition, average grain size and grain orientation.
- The presence of PS on the surface of TiNi-based alloys leads to: (1) under static tension to a slight (by 30 MPa) increase in martensitic shear stress, an elongation of the martensitic yield area by 20% compared to the initial properties of the alloy; (2) does not reduce the inelastic properties of the material, changes the ratio of the contributions of shape memory effects and superelasticity to reversible deformation, which is important for the use of this method of surface modification of TiNi-based alloys in medicine; (3) to increase the thromboresistance of the surface by more than 2 times; (4) non-toxic, promote the differentiation of rat bone marrow mesenchymal stem cells into bone tissue cells.
Developments
Within the framework of the Federal Target Program "Research and development in priority areas of development of the scientific and technological complex of Russia for 2007-2013" in the period from 06/05/2012. until June 30, 2013 OTR was carried out on the topic “Development of technology for ion-plasma processing of the near-surface layer of umbrella devices implanted in the atria”, state contract number 16.522.12.2019. Head of work S.G. Psakhye, responsible executor A.I. Lotkov. The main executor of the state contract was the Institute of Physics and Mathematics of the Siberian Branch of the Russian Academy of Sciences (Laboratory of Materials Science of Shape Memory Alloys). Co-executors of the work were 12 different organizations, including TSU, Research Institute of Cardiology of the Siberian Branch of the Russian Academy of Medical Sciences, ICBFM SB RAS, Moscow State University and industrial partner Angioline Interventional Device LLC (Novosibirsk).
As a result of the work:
- a technological process has been developed for modifying the surface of a cardiac implant made of titanium nickelide with silicon ions using the method of high-dose ion implantation, which ensures acceleration of endothelialization of the implant and its integration with the body by 1.3 times;
- a technology has been created for the manufacture of a cardiac implant - an umbrella occluder for closing the left atrial appendage with a transcatheter delivery system with high parameters of biocompatibility, strength and fatigue life;
- pilot industrial technologies and equipment for ion-plasma surface treatment of occluders.
The development is intended to solve a world-class problem - the prevention of strokes in patients with non-valvular atrial fibrillation (atrial fibrillation), caused by the formation of blood clots in the left atrial appendage.
Technological developments are protected by RF patents No. 2508130, No. 2522932; No. 2538708 (patent holder - ISPMS SB RAS).
The industrial partner Angioline Interventional Device LLC received permission from Roszdravnadzor for the production and use of the developed occluder and organized its production.
Within the framework of the Federal Target Program "Research and development in priority areas of development of the scientific and technological complex of Russia for 2014-2020" in the period from June 17, 2014. until December 31, 2015 performed PNI on the topic “Study of the possibility of increasing the degree of cell adhesion, proliferation and viability of endothelial cells on vascular stents made of titanium nickelide-based alloys by plasma-immersion ion modification of their surface”, grant agreement No. 14.604.21.0031. Head of work A.I. Lotkov. The main executor of the state contract was the Institute of Physics and Mathematics of the Siberian Branch of the Russian Academy of Sciences (Laboratory of Materials Science of Shape Memory Alloys). Co-executors of the work were the Scientific Research Institute of the Communist Party of the Soviet Union (Kemerovo) and the industrial partner Angioline Interventional Device LLC (Novosibirsk).
As a result of the work:
- a technological process has been developed for modifying the surface of intravascular stents made of titanium nickelide with silicon ions using the method of plasma immersion treatment, which ensures acceleration of the proliferation of endothelial cells in in vitro experiments by 1.5 - 1.7 times, which reduces the risk of complications after implantation of a stent in the human body ( restenosis and thrombosis).
The development is intended to solve a world-class problem - reducing the risk of restenosis and thrombosis in patients with atherosclerosis, caused by the body's reaction to the installation of an implant.
Technological developments are protected by RF patents No. 2579314, No. 169200 (patent holder - Institute of Physics and Applied Mathematics SB RAS).
Within the framework of the Federal Target Program “Research and development in priority areas of development of the scientific and technological complex of Russia for 2007-2013” ​​in the period from October 27, 2015. until December 31, 2017 PNIER was carried out on the topic “Study of the interaction of ion-modified self-expanding stents for peripheral vessels with tissues and fluids of a living body and the creation of an experimental sample of a domestic stent with improved properties”, agreement No. 14.578.21.0118 on the provision of a subsidy dated October 27, 2015. Head of work A. AND. Lotkov. The main contractor of the state contract was NI TSU. Co-executors of the work were the Institute of Physics and Mathematics of the Siberian Branch of the Russian Academy of Sciences (Laboratory of Materials Science of Shape Memory Alloys), the Scientific Research Institute of Computer Science of the National Research Medical Center named after. Academician E.N. Meshalkina (Novosibirsk) and industrial partner Angioline Interventional Device LLC (Novosibirsk).
As a result of the work:
- a laboratory technology has been created for the manufacture of a self-expanding stent of an original design from an alloy based on titanium nickelide with a surface modified by silicon atoms with a delivery system for restoring the lumen of peripheral vessels in patients with atherosclerosis, which ensured acceleration of the integration of stents with a living organism by 1.3-1.4 times.
The development is intended to solve a world-class problem - reducing the risk of restenosis and thrombosis in patients with atherosclerosis, caused by the body's reaction to the installation of an implant.
The technological development is protected by RF patent No. 2633639.
A unique method for the synthesis of multicomponent surface Ti-Ta-X (X=Ni, Zr, Nb) alloys with a thickness of fractions to several micrometers on TiNi substrates has been developed, together with a team of performers from the Institute of Electromagnetic Energy SB RAS. The method is based on the principles of additive nanotechnology and consists of repeated alternation in a single vacuum cycle of operations of deposition of a thin doping film and its liquid-phase mixing with the substrate using a wide-aperture low-energy high-current electron beam (HCEB). The method is implemented on a modernized RITM-SP installation (ISE SB RAS), equipped with a magnetron sputtering system consisting of three magnetrons. It is shown that by varying the elemental composition and film thickness, as well as synthesis conditions (NSEP energy density in each pulse, the number of pulses in each synthesis cycle and the number of synthesis cycles), this approach allows the synthesis of surface alloys with a nanocomposite and amorphous structure of a given thickness and controlled elemental and phase compositions. In contrast to the known 2D surface structures with an amorphous and nanocomposite structure, deposited on 3D substrates by traditional (PVD, etc.) methods, surface alloys synthesized by this method are completely free of problems associated with limited adhesion of the coating and the danger of its peeling off from the substrate during the process. operation.
Projects, grants, contracts
1. Federal Target Program, Experimental and technological work on the topic “Development of technology for ion-plasma processing of the near-surface layer of umbrella devices implanted in the atria,” state contract number 16.522.12.2019. (supervisor - Psakhye S.G., supervisor - Lotkov A.I.)
2. Federal Target Program, Applied scientific research on the topic “Study of the possibility of increasing the degree of cell adhesion, proliferation and viability of endothelial cells on vascular stents made of titanium nickelide-based alloys by plasma-immersion ion modification of their surface”, agreement No. 14.604.21.0031 on the provision of a subsidy from 06/17/2014 (managed by A.I. Lotkov)
3. Federal Targeted Program, Applied scientific research and experimental development on the topic “Study of the interaction of ion-modified self-expanding stents for peripheral vessels with tissues and fluids of a living body and the creation of an experimental sample of a domestic stent with improved properties,” agreement No. 14.578.21.0118 on the provision of a subsidy dated 10/27 .2015 (headed by A.I. Lotkov)
4. RSF project No. 15-13-00023 (2015-2017) Study of the structural-phase states and properties of surface Ti-Ta alloys formed on the principles of additive technologies by pulsed electron beam melting of film-substrate systems in order to increase mechanical compatibility, radiopacity and biointegration of medical alloys with shape memory based on titanium nickelide (supervisor - Meissner L.L.).
5. RSF project No. 18-19-00198 (2018-2020) Functional Ti-Ta/Nb-Si/Ni surface alloys with nanocomposite and amorphous structure on TiNi alloy substrates: thermodynamic modeling, thin-film electron beam synthesis, atomic structure and physical and mechanical properties (supervisor - Meisner L.L.).
6. Draft state assignment III.23.2.1 “Development and justification of the physical principles of engineering coatings and surface layers with ultradisperse, including low-dimensional, structure for the creation of materials with high physical, mechanical and chemical characteristics” (No. 0367-2018-0005) (headed by L.L. Meisner)
7. Program of fundamental scientific research of state academies of sciences for 2013-2020 Project No. III.23.2.2 “Development of scientific foundations for the creation of metal and composite materials with a hierarchically organized structure” (headed by A.I. Lotkov, E.V. Naidenkin )
8. RFBR project No. 08-08-00515 “The role of crystal structure defects in the mechanisms of fragmentation of the microstructure of metal alloys under the influence of large plastic deformation” (2008-2010) (supervisor - Baturin A.A.)
9. RFBR project No. 13-08-90421 Ukr_f_a “Possibilities of achieving the maximum resource of reversible inelastic deformation during plastic deformation of shape memory alloys for power and actuator devices” (2013-2014) (supervisor - Lotkov A.I.)
10. RFBR project No. 14-08-31602 mol_a “Study of the patterns of formation of highly nonequilibrium gradient-varying nano- and submicroscale structural-phase states localized in the near-surface region of titanium nickelide as a result of electron beam effects on the surface of the sample before and after its coating with a submicron layer tantalum" (2014-2015) (headed by A.A. Neiman)
11. RFBR project No. 16-58-00143 Bel_a “Comprehensive increase in the strength and corrosion resistance of titanium alloys alloyed with biologically inert elements when forming an ultra-fine-grained structure for medical implants” (2016-2017) (supervisor - A.I. Lotkov )
12. RFBR project No. 16-38-00601 mol_a “Temperature dependence of reversible inelastic deformation of alloys based on titanium nickelide with different grain sizes” (2016-2017) (supervisor - Zhapova D.Yu.)
13. RFBR project No. 15-08-99489 “Development of physical principles for reducing hydrogen embrittlement of materials with shape memory effect and superelasticity” (2015-2017) (supervisor - Lotkov A.I.)
Major publications
1. Lotkov A.I., Goncharova V.A., Lapshin V.P., Grishkov V.N., Podlevskikh M.N.. The influence of hydrostatic pressure on the elastic constants of the B2 phase of the Ti50Ni48Fe3 alloy with a shape memory effect.// Reports of the Academy of Sciences. -1993.-T. 30.-No.2.-S. 191-193.
2. Lotkov AI, Dubinin SF, Teplouchov SG, Grishkov VN and Skorobogatov VP Premartensitic Phenomena in Ti49Ni51 Single Crystal//Journal De Physique IV, Colloque C8, supplement an Journal de Pnysique III, Volume 5, December 1995.- pp. C8-551-C8-555.
3. Lotkov A.I., Grishkov V.N., Dubinin S.F., Teploukhov S.T. Pre-martensitic and martensitic transformations in the Ti49Ni51 single crystal: the influence of aging..//News of higher educational institutions. Physics.-1999.-No.7.-S. 64-70.
4. Grishkov V.N., Lotkov A.I.. The influence of chemical composition and atomic long-range order on the temperatures of martensitic transformations in binary alloys based on TiNi. 1. Monophase alloys.//Advanced materials.-2002.-No.6.-P.5-12.
Lotkov A.I., Baturin A.A., Positron spectroscopy of B2-titanium compounds. Electronic structure, point defects, martensitic transformations. - Tomsk: NTL Publishing House, 2004.-232 p.
5. Grishkov V.N., Lotkov A.I., Dubinin S.F., Teploukhov S.G., Parkhomenko V.D. Modulation of short-wave atomic displacements in an alloy based on TiNi, preceding the martensitic transformation B2В®B19Вў//Physics of Solid State.-2004.-T. 46.-Issue.8.-P.1348-1355.
6. Meisner LL, Sivokha VP / Effect of applied stress on the shape memory behavior of TiNi-based alloys with different consequences of martensitic transformations // Physica B. -2004.-Vol.344.-P.93-98.
7. Lotkov A.I., Meisner L.L., Grishkov V.N. Alloys based on titanium nickelide: ion-beam, plasma and chemical modification of the surface. // physics of metals and metallurgy. 2005.-Vol. 99.- No. 5.-p. 66-78.
8. Lotkov A.I., Grishkov V.N., Dubinin S.F., Teploukhov S.G. Pre-martensitic and martensitic transformations in Ti49Ni51 single crystal. Hardened state from the region of homogeneity of the B2 phase.//Advanced materials.-2005.-No.1.-p. 73-78.
9. Grishkov S.G., Dubinin S.F., Lotkov A.I., Parkhomenko V.D., Pushin V.G., Teplukhov S.G. Displacement superstructure in an alloy based on titanium nickelide, preceding the martensitic transformation B2В®B19Вў // Physics of metals and metal science. - 2005. - volume 99. - No. 4. - p. 101-112.
10. Lotkov A.I., Baturin A.A., Grishkov V.N., Kovalevskaya Zh.G., Kuznetsov P.V. The influence of ultrasonic plastic processing on the structural-phase state of the titanium nickelide surface//Letters in ZhTP.-2005-Vol.31-issue 21.-p. 24-29.
11. Gritsenko B.P. The role of acoustic vibrations generated by friction in the destruction of tribosystem materials. Friction and wear. No. 5, 2005. pp. 481-488.
12. Gritsenko B.P., Krukovsky K.V., Girsova N.V., Kashin O.A. “The influence of high-dose ion implantation and acoustic vibrations generated during friction on the wear resistance of armco iron and steel 45.” Friction and wear. No. 6, 2005. pp. 622-627.
13. Gritsenko B.P., Krukovsky K.V., Girsova N.V., Kashin O.A. “The influence of high-dose ion implantation and acoustic vibrations generated during friction on the wear resistance of armco iron and steel 45.” Friction and wear. No. 6, 2005. pp. 622-627.
14. Titanium nickelide alloys with shape memory. Part 1. Structure, phase transformations and properties. Collective monograph. Scientifically edited by Professor Pushin V.G. Ekaterinburg: Ur0 RAS, 2006.-438p.
Meisner LL Lotkov AI, Rotshtein VP, Markov AB, Razdorskii VV, Kopisova VA. Surface modification of TiNi alloy by electron beam influence. // Izv.university. Physics.-2006.-No.8. Appendix.-S. 258-261.
15. Kolobov Yu.R., Kashin O.A., Sharkeev Yu.P., Gritsenko B.P., Naidenkin E.V. Technologies for treating the surface of technical and medical products with high-energy flows to restore their geometric dimensions and increase their service life. // Mechanical engineering technology. - 2006. - No. 4. - P. 39-44.
16. Dudarev E.F., Pochivalova G.P., Kolobov Yu.R., Kashin O.A. True grain boundary slip in coarse-grained and submicrocrystalline metals and alloys. In the book: Features of the structure and properties of promising materials. Tomsk: Publishing house. NTL, 2006. - pp. 349-364
17. Lotkov A.I., Baturin A.A., Grishkov V.N., Kopylov V.I. On the possibility of the role of defects in the crystal structure in the mechanisms of nanofragmentation of the grain structure during intense cold plastic deformation of metals and alloys. And the journal physical mesomechanics. - 2007.-Vol. 10.-No. 3, -p. 64-79.
18. Psakhye S.G., Dudarev E.F., Kashin O.A., Naidenkin E.V., Kaminsky P.P. Structure and elastic-plastic properties of ultrafine-grained titanium VT1-0 and alloy VT6 // Questions of Materials Science. - 2007. - No. 4 (52). - pp. 208-213.
19. Surface nanoengineering. Formation of nonequilibrium states in surface layers of materials using electron-ion-plasma technologies. Collective monograph. Responsible editors: Corresponding Member of the Russian Academy of Sciences Lyakhov N.Z., Doctor of Physics and Mathematics. Sciences Psakhye S.G.. Novosibirsk. Publishing house of the Siberian Branch of the Russian Academy of Sciences.-2008.-276 p.
20. Mironov Yu.P., Meisner L.L., Lotkov A.I. Structure of surface layers of titanium nickelide formed by pulsed electron beam melting. // ZhTF. -2008. -T. 78, -V.7, pp.118-126.
21. Meisner L.L., Nikonova I.V., Lotkov A.I., Razdorsky V.V., Kotenko M.V. The influence of ion- and electron-beam modification of the surface on the corrosion properties and biocompatibility of titanium nickelide in in vivo experiments. // Advanced materials. -2008.-No.3.-P.1-13.
22. Lotkov A.I., Psakhye S.G., Meisner L.L., Matveeva V.A., Artemyeva L.V., Meisner S.N., Matveev A.L. The influence of the chemical composition and surface roughness of titanium nickelide on the proliferative properties of mesenchymal stem cells // Perspective materials. -2011.- No. 4.- P.42-53.
23. Lotkov AI, Baturin AA Physical nature of martensite transformations in B2-type Ti compounds and TiNi-based alloys // Physical Mesomechanics.-V.14.-в„–5-6.-(2011). pp. 261-274.
24. S.G. Psakhye, A.I. Lotkov, L.L. Meisner, S.N. Meisner, V.A. Matveeva The influence of silicon alloying of surface layers of titanium nickelide on its corrosion resistance and biochemical compatibility // Izv. Universities. Physics. -2012. -T.55. -No. 9. P.78-87.
25. Zolotukhin Yu.S., Lotkov A.I., Klopotov A.A., Grishkov V.N. Model of martensitic transformation B2 в†’ R in alloys with B2 superstructure // Physics and Mathematics. 2012. T.113. No. 6. P.571-579.
26. Meisner LL, Lotkov AI, Matveeva VA, Artemieva LV, Meisner SN, Matveev AL Effect of Silicon, Titanium, and Zirconium Ion Implantation on NiTi Biocompatibility // Hindawi Publishing Corporation. Advances in Materials Science and Engineering Vol. 2012, Article ID 706094, 16 pages doi:10.1155/2012/706094
27. Firstov G., Koval Yu., Lotkov AI, Grishkov V., Van Humbeeck J. The increase of the martensitic deformation during shape memory effect in deformed TiNi // Functional Mater. Let's. 2012. V.5. #1. 1250011. P.1250011-1-1250011-4.
28. SG Psakhie, AI Lotkov, LL Meisner, SN Meisner, VA Matveyeva The surface alloying effect of silicon in a binary NiTi - base alloy on the corrosion resistance and biocompatibility of the material // Russian Physics Journal. V. 55(в„–9), pp. 1063 - 1073, (2013).
29. Psakhye S.G., Lotkov A.I., Meisner L.L., Kudryashov A.N., Meisner S.N., Abramova P.V., Galanov A.I., Korshunov A.V. Corrosion resistance of silicon-modified titanium nickelide in blood plasma // Izv. TPU.-2013.- T.322.- No. 3.- P.6-11.
30. Lotkov A.I., Baturin A.A., Grishkov V.N., Kopylov V.I., Timkin V.N. The influence of equal-channel-angular pressing on grain refinement and inelastic properties of alloys based on titanium nickelide // Izv. universities Ferrous metallurgy. - 2014 - T.57. - No. 12. P.50-55.
31. Lotkov A.I., Kashin O.A., Grishkov V.N., Krukovsky K.V. Influence of the degree of deformation during isothermal abc pressing on the evolution of the structure and temperature of phase transformations of an alloy based on titanium nickelide // Perspective materials. - 2014. - No. 9. - P.5-18.
32. Psakhie SG, Meisner SN, Lotkov AI, Meisner LL, Tverdokhlebova AV Effect of Surface Alloying by Silicon on the Corrosion Resistance and Biocompatibility of the Binary NiTi // Journal of Materials Engineering and Performance, - 2014, - Vol. 23, - Issue 7, pp. 2620-2629.
33. Neiman A.A., Meisner L.L., Lotkov A.I., Semin V.O. Phase and structural states induced in the surface layers of titanium nickelide by pulsed high-current electron beam effects // Izvestia VUZov. Physics. - 2015. - T.58, No. 2. - P.103-112.
34. Meisner L.L., Ostapenko M.G., Lotkov A.I., Neiman A.A. Features of the formation and distribution of phases in the surface layers of TiNi after electron beam effects // Izvestia VUZov. Physics. - 2015. - T.58, No. 5. - P.77-84.
35. Meisner S.N., Meisner L.L., Lotkov A.I., Tverdokhlebova A.V. Refinement of the structure of the surface layer of titanium nickelide after ion modification with silicon ions // News of universities. Ferrous metallurgy. -2015. - T.58, No. 4. - P.267-271.
36. Lotkov A.I., Koval Yu.N., Grishkov V.N., Zhapova D.Yu., Timkin V.N., Firstov G.S. Influence of Deformation during Warm Rolling on Martensitic Transformation Temperatures and the Value of Superelasticity and Shape Memory Effects in Ti49.2Ni50.8 (at%) Alloy // Inorganic Materials: Applied Research. - 2015. - V.6. - No. 5. - pp.498-505.
37. Aleksandr Lotkov, Anatolii Baturin, Victor Grishkov, Ivan Rodionov, Victor Kudiyarov and Andrei Lider Effect of Hydrogen on Superelasticity of the Titanium Nickelide-Based Alloy // AIP Conference Proceedings. - 2015. V.1683. - P.020124-1-020124-4. doi: 10.1063/1.4932814.
38. Aleksandr I. Lotkov, Oleg A. Kashin, Yuliya A. Kudryavtseva, Larisa V. Antonova, Andrey N. Kudryashov, Vera G. Matveeva and Evgeniya A. Sergeeva. Interaction of human endothelial cells and nickel-titanium materials modified with silicon ions // AIP Conference Proceedings. - 2015. V.1683. - P.020126-1-020126-5. doi: 10.1063/1.4932816.
39. Lotkov A.I., Grishkov V.N., Kashin O.A., Baturin A.A., Zhapova D.Yu., Timkin V.N. Mechanisms of microstructure evolution in TiNi-based alloys under warm deformation and its effect on martensite transformation. The chapter in "Shape memory alloys: properties, technologies, opportunities". Edv. VV Rubanic and NN Resnina. Switzerland: Trans. Tech. Publication 2015. 641 p. P.245-259.
40. AI Lotkov, OA Kashin, VN Grishkov, and KV Krukovskii. The Influence of Degree of Deformation under Isothermal abc Pressing on Evolution of Structure and Temperature of Phase Transformations of Alloy Based on Titanium Nickelide // ISSN 2075_1133, Inorganic Materials: Applied Research, 2015, Vol. 6, No. 2, pp. 96-104. doi: 10.1134/S2075113315020112
41. AA Neiman, LL Meisner, AI Lotkov, NN Koval, VO Semin, AD Teresov. Cross-sectional TEM analysis of structural phase states in TiNi alloy treated by a low-energy high-current pulsed electron beam. // Applied Surface Science (Elsevier). -2015.-V.327.-pp.321-326.
42. L. Meisner, Crystal-Chemical Aspects of the Stability of the Ordered Phase B2 in Volume Alloying of TiNi, in: (N. Resnina, V. Rubanik -eds.) Shape Memory Alloys: Properties, Technologies, Opportunities. Materials Science Foundation, Trans Tech Publication. 2015 pp. 554-571.
43. Zhapova D.Yu., Lotkov A.I., Grishkov V.N., Timkin V.N., Rodionov I.S., Kolevatov A.S., Belosludtseva A.A. Inelastic properties of titanium nickelide after warm abc pressing // News of universities. Physics. - 2016. - T. 59. - No. 7/2. - P.60-64.
44. Akhmedov Sh.D., Batalov R.E., Andreev S.L., Lugovsky V.A., Afanasyev S.A., Rebrova T.Yu., Vaizov V.Kh., Rogovskaya Yu.V., Lotkov A.I., Kudryashov A.N., Popov S.V. The first experience of implantation of domestically produced umbrella devices into the left atrial appendage in an experiment // Russian Journal of Cardiology - 2016 - No. 12 (140) - P.70-74.
45. Meisner S.N., Dyachenko F.A., Yakovlev E.V., Meisner L.L. The influence of the number of pulses of exposure to an electron beam on the change in the physical and mechanical properties of the surface layer of titanium nickelide // News of higher educational institutions. Physics. - 2016. - T. 59, No. 7/2. - P.159-163.
46. ​​LL Meisner, AB Markov, DI Proskurovsky, VP Rotshtein, GE Ozur, SN Meisner, EV Yakovlev, TM Poletika, SL Girsova, VO Semin. Effect of inclusions on cratering behavior in TiNi shape memory alloys irradiated with a low-energy, high-current electron beam // Surface & Coatings Technology 302 (2016) 495-506.
47. Meisner LL, Poletika TM, Girsova SL, Meisner SN Effect of crystallographic orientation on the structure of surface layers of the single NiTi crystals subject to ion implantation // Vacuum. 2016. Vol. 129. P. 126-129.
48. A.I. Lotkov, V.G. Matveeva, L.V. Antonova, O.A. Kashin, A.N. Kudryashov. The main directions of modification of the surface of endovascular metal stents in solving the problem of restenosis (Review, part 1) // Complex problems of cardiovascular diseases, No. 1, 2017, pp. 122-130. doi: 10.17802/2306-1278-2017-1-122-130
49. A.I. Lotkov, V.G. Matveeva, L.V. Antonova, O.A. Kashin, A.N. Kudryashov. Main directions of modification of the surface of endovascular metal stents in solving the problem of restenosis (Review, part 2) // Complex problems of cardiovascular diseases, No. 3, 2017, pp. 131-142 doi: 10.17802/2306-1278-2017-6-3 -131-142
50. Lotkov A.I., Grishkov V.N., Baturin A.A. High reversible inelastic deformations during plastic deformation of titanium nickelide / Advanced materials and technologies, Monograph. In 2 vols., T1, Vitebsk: UO "VSTU", ISBN 978-985-481-510-7, Chapter 21, pp.341-357.
51. Baturin A., Lotkov A., Grishkov V., Rodionov I., Krukovskiy K. Hydrogen-induced failure of TiNi based alloy with coarse-grained and ultrafine-grained structure // Structural Integrity Procedia. 2016. V.2. P. 1481-1488. doi. 10.1016/j.prostr.2016.06.188.
52. Oleg Kashin, Evgeni Dudarev, Aleksandr Lotkov, Victor Grishkov. Dimensional stability of coarse-grained and submicrocrystalline tini shape memory alloy for medical use under quasistatic and cyclic bending. // Structural Integrity Procedia. 2016. V.2. pp.1514-1521. doi: 10.1016/j.prostr.2016.06.192.
53. AI Lotkov, OA Kashin, DP Borisov, MG Ostapenko, AA Neiman, KV Krukovskii, E.Yu. Gudimova. Effect of plasma immersion ion beam processing on the structure-phase state and the properties of the surface layers in titanium nickelide samples // Journal Russian Metallurgy (Metally), 2017(4), 250-254. doi10.1134/S0036029517040139.
54. Meisner LL, Markov AB, Rotshtein VP, Ozur GE, Meisner SN, Yakovlev EV, Semin VO, Mironov Yu.P., Poletika TM, Girsova SL, Shepel DA Microstructural characterization of Ti-Ta-based surface alloy fabricated on TiNi SMA by additive pulsed electron-beam melting of film/substrate system // J. Alloys Comp. - 2018. - Vol. 730. - P. 376-385. - https://doi.org/10.1016/j.jallcom.2017.09.238 .
55. Meisner SN, Yakovlev EV, Semin VO, Meisner LL, Rotshtein VP, Neiman AA, D'jachenko F. Mechanical behavior of NiTi surface alloyed with TiTa by pulsed electron beam melting // Applied Surface Science.-2018. -Vol.437. -P.217-226. https://doi.org/10.1016/j.apsusc.2017.12.107
List of patents
1. Sivokha V.P., Meisner L.L. Shape memory alloy (Options). RF patent for invention No. 2251584 dated May 10, 2005.
2. Meisner L.L., Lotkov A.I., Sivokha V.P., Psakhye S.G., Rotshtein V.P., Ozur G.E., Karlik K.V. Material with shape memory effect. RF patent for invention No. 2259415 dated 08/27/2005.
Alloy with shape memory effect, RU 2100468 C1, publ.: 1997.12.27, Author(s): Meisner L.L.; Sivokha V.P.; Khachin V.N.; Lotkov A.I.
3. Device for monitoring the presence of a burner flame, RU 2193734 C2, publ.: 2002.11.27, Author(s): Grishkov V.N.; Lotkov A.I.; Panin V.E.; Kozubov V.I.
Thermosensitive switch, RU 2177656 C1, publ.: 2001.12.27, Author(s): Grishkov V.N.; Lotkov A.I.; Kozubov V.I.
4. Fire-retarding valve, RU 2195984 C2, publ.: 2003.01.10, Author(s): Grishkov V.N.; Lotkov A.I.; Panin V.E.; Kozubov V.I.; Timkin V.N.
5. A method for repairing the inner surface of pipes and a method for manufacturing a bandage for repairing the inner surface of pipes, RU 2235188 C2, publ.: 2004.08.27, Author(s): Grishkov V.N. (RU); Lotkov A.I. (RU); Kozubov V.I. (RU).
6. Turbine flow meter (options), RU 2264600 C2, publ.: 2005.11.20, Author(s): Grishkov V.N. (RU); Lotkov A.I. (RU); Kozubov V.I. (RU).
7. Material with shape memory effect, RU 2259415 C1, publ.: 2005.08.27, Author(s): Meissner L.L. (RU); Lotkov A.I. (RU); Sivokha V.P. (RU); Psakhye S.G. (RU); Rotshtein V.P. (RU); Ozur G.E. (RU); Karlik K.V.
8 . Ventilation damper (variants), RU 64741 U1, publ.: 2007.07.10, Author(s): Grishkov V.N. (RU); Lotkov A.I. (RU); Kozubov V.I. (RU); Markova I.I.(RU ).
9. Kotenko M.V., Meisner L.L. Suvorov O.Yu., Lesnikov V.I., Lotkov A.I., Shlyakhov N.V. Implant for the lateral segments of the upper jaw. Utility model patent No. 86451. Bull. No. 25, 09/10/2009.
10. Kotenko M.V., Meisner L.L. Suvorov O.Yu., Lesnikov V.I., Lotkov A.I., Shlyakhov N.V. Sheet-shaped implant for the lateral segments of the upper jaw. Utility model patent No. 86452. Bull. No. 25, 09/10/2009.
11. Meisner L.L., Lotkov A.I., Razdorsky V.V., Kotenko M.V., Nikonova I.V., Makarevsky I.G. “Dental intraosseous implant and shape memory material for its manufacture.” Patent No. 2397732 dated January 27, 2010, published August 27, 2010 Bulletin. No. 24.
12. RF Patent No. 2464116 Method for producing high-strength titanium rods of round cross-section with an ultra-fine-grained structure / Dudarev E.F., Tabachenko A.N., Skosyrsky A.B., Martsunova L.S., Bakach G.P., Pochivalova G. P., Kudryavtsev V.A., Kashin O.A., Lotkov A.I., Kaminsky P.P., Kashina O.N. Published 10/20/2012.
13. Thermal treatment mode of the umbrella device for occlusion of the left atrial appendage. Know-how No. 4. Order of the Institute of Physics and Applied Mathematics SB RAS dated September 25, 2012 No. 65-od. / A.I. Lotkov, V.N. Grishkov, O.A. Kashin, L.L. Meisner, V.N. Timkin, D.Yu. Zhapova.
14. Psakhye S.G., Lotkov A.I., Meisner L.L., Meisner S.N., Barmina E.G. A method for manufacturing a cardiac implant from an alloy based on titanium nickelide with a surface layer modified by ion-plasma treatment. RF Patent No. 2508130, Bull. No. 6, 02/27/2014.
15. Lotkov A.I., Kudryashov A.N., Psakhye S.G., Meisner L.L., Meisner S.N., Kashin O.A., Grishkov V.N., Neiman A.A., Krukovsky K.V. Umbrella device (Occluder) with a modified surface layer. Patent No. 2522932, 05/21/2014, Bull. No. 20, 07/20/2014
16. Psakhye S.G., Mikhailov M.N., Legostaev V.N., Remnev G.E., Lotkov A.I., Meisner L.L., Kashin O.A., Lauk A.L. Installation of ion-plasma processing of products. Patent No. 2538708, November 21, 2014, Bull. No. 1, 01/10/2015.
17. Lotkov A.I., Kashin O.A., Borisov D.P., Krukovsky K.V., Kudryashov A.N., Kudryavtseva Yu.A., Antonova L.V., Korshunov A.V. A method for plasma-immersion ion modification of the surface of an alloy product based on titanium nickelide for medical use. RF Patent No. 2579314, 05/22/2015, Bull. No. 10, 04/10/2016.
18. Borisov D.P., Lotkov A.I., Kuznetsov V.M., Kashin O.A., Kudryashov A.N., Krukovsky K.V., Slabodchikov V.A. Device for vacuum-plasma homogeneous modification of the surface of parts. RF patent for utility model No. 169200, November 20, 2015. Bull. No. 7, 03/09/2017.
19. Lotkov A.I., Kashin O.A., Kuznetsov V.M., Kudryashov A.N., Borisov D.P., Krukovsky K.V., Slabodchikov V.A. A method for manufacturing a self-expanding peripheral stent from an alloy based on titanium nickelide with a modified surface. RF patent 2633639, 05.12.2016. Bull. No. 29, 10/16/2017
Resources
1. The optical microscope "Axiovert-200MAT" is designed to study the microstructure and phase composition of materials, surface morphology, dynamic processes in materials under changing temperature conditions.
2. X-ray diffractometers DRON-3M and DRON-7 are designed to determine the types of crystal structures, qualitative and quantitative phase analysis of materials, studies of phase transformations, structural states in the bulk and near-surface regions of materials.
3. The LEO EVO-50 scanning electron microscope is designed for examining the surfaces of conductive and non-conducting materials and their damage, and local chemical microanalysis of materials.
Communication with universities
Lotkov A.I.
Chairman of the State Attestation Committee No. 1 (bachelors) and State Attestation Committee No. 2 (masters) in the direction 010700-physics, Engineering School of Nuclear Technologies, Department of Experimental Physics of Tomsk Polytechnic University.
Chairman of the State Attestation Committee No. 1 (bachelors, specialists, masters) of the Faculty of Physics in the direction of physics and specialty 04/01/07 - condensed matter physics of the Department of Metal Physics and the Department of Semiconductor Physics of Tomsk State University. Supervises graduate students.
Meisner L.L. Professor of the Department of Metal Physics, Faculty of Physics, TSU:
- delivering lecture courses “Crystallography”, “X-ray structural analysis. Part 1: Theory of X-ray scattering", "X-ray structural analysis. Part 2: X-ray research methods";
- carrying out laboratory work on X-ray diffraction analysis.
Management of graduate students of the Institute of Physics and Mathematics and Applied Mathematics SB RAS, master's, diploma and coursework of students of the Faculty of Physics and Physics and Technology of TSU.
Baturin A.A., Associate Professor, TPU. School of Nuclear Technology Engineering, Department of Experimental Physics.
Special courses for master's students in the direction 03.04.02 Physics, OOP "Physics of Condensed Matter":
1. "Theory and properties of solids and disordered materials"
2. "Defects of solids and modification of materials"
Management of coursework and final qualifying works for bachelors, masters, and graduate students TSU and TPU.
Gudimova E.Yu. Assistant at the Department of Metal Physics, Faculty of Physics, National Research Tomsk State University:
- conducting laboratory work on X-ray structural analysis.
Management of coursework and final qualifying works for bachelors and masters of the FF NI TSU.
Public acceptance
Visit to the Institute of Physics and Mathematics of the Siberian Branch of the Russian Academy of Sciences by the Deputy Chairman of the Government of the Russian Federation and the head of the FANO of Russia. From left to right, first row: Zhvachkin S.A (Governor of the Territory), Dvorkovich A.V (Deputy Chairman of the Government of the Russian Federation), Kotyukov M.M. (Head of FANO Russia), Chubik P.S. (Rector of NI TPU), Lotkov A.I. (Head of the MSPP laboratory).
Visit to the Institute of Physics and Mathematics of the Siberian Branch of the Russian Academy of Sciences by the Deputy Chairman of the Government of the Russian Federation and the head of the FANO of Russia. From left to right, first row: S.A. Zhvachkin (Governor of the TO), A.V. Dvorkovich (Deputy Chairman of the Government of the Russian Federation), M.M. Kotyukov. (Head of FANO Russia).
Work on experimental technological equipment