Neonila Levintant-Zayonts, Ph.D.

Department of Mechanics of Materials (ZMM)
Division of Surface Layers (PWW)
position: assistant professor
telephone: (+48) 22 826 12 81 ext.: 261
room: 230
e-mail: neonila

Doctoral thesis
2011-03-31Wpływ implantacji jonowej na własności materiałów z pamiecią kształtu typu NiTi 
supervisor -- Stanisław Kucharski, Ph.D., Dr. Habil., Eng., IPPT PAN
640
 
Recent publications
1.Levintant Zayonts N., Kwiatkowski L., Swiatek Z., Brzozowska J., Local Pseudoelastic Behaviour and Surface Characteristics of N Ion Implanted NiTi Shape Memory Alloy, ACTA PHYSICA POLONICA A, ISSN: 0587-4246, DOI: 10.12693/APhysPolA.132.210, Vol.132, No.2, pp.210-216, 2017
Abstract:

The main goal of the proposed paper is to present the results of the nitrogen ion implantation effects on mechanical and corrosion properties of NiTi shape memory alloy. Local pseudoelasticity phenomena of NiTi were determined using the ultra-low load applied system. The load–penetration depth curves show that lower nitrogen fluence improves mechanical properties in the near surface layer but higher ion fluence leads to degradation of pseudoelasticity properties. Corrosion resistance of NiTi in the Ringer solution was evaluated by means of electrochemical methods. The results of potentiodynamic measurements in the anodic range for implanted NiTi indicate a decrease of passive current density range in comparison with non-treated NiTi, without any signs related to Ni release. The results of impedance measurements recorded at the corrosion potential show a capacitive behaviour for all samples without clear predominance of one of them. It can be explained by the fact that this result concerns the first stage of corrosion exposition. It is shown that nitrogen ion implantation leads to formation of modified surface of improved physicochemical properties

Affiliations:
Levintant Zayonts N.-IPPT PAN
Kwiatkowski L.-other affiliation
Swiatek Z.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Brzozowska J.-Instiute of Precision Mechanics (PL)
2.Mościcki T., Radziejewska J., Hoffman J., Chrzanowska J., Levintant-Zayonts N., Garbiec D., Szymański Z., WB2 to WB3 phase change during reactive spark plasma sintering and pulsed laser ablation/deposition processes, CERAMICS INTERNATIONAL, ISSN: 0272-8842, DOI: 10.1016/j.ceramint.2015.03.042, Vol.41, pp.8273-8281, 2015
Abstract:

Reactive spark plasma sintering (SPS) of WB2/WB3 ceramics from elements is studied; the sintering pressure dependence of the ratio of WB3 to WB2 in samples produced by SPS is discussed. Regardless of the sintering pressure, the obtained samples are very hard ~20 GPa. WB3 superhard films prepared by pulsed laser deposition (PLD) from selected SPS targets are presented.

WB3 coatings were prepared on Si (100) substrates using a nanosecond, Nd:YAG laser operating at a 355 nm wavelength. The phase analysis, crystallography, and orientations have been studied using X-ray diffraction (XRD). A WB2 to WB3 phase transformation from 8.2% WB3 in a sintered target to 93.3% WB3 in a deposited film was observed. Additionally, the surface of a SPS sintered WBx target after the ablation process was examined. XRD studies show that already during the laser ablation there is a significant WB2 to WB3 phase transformation. Vickers hardness of sintered samples was measured in macro- and micro-scale, and PLD films in the nanoscale.

Keywords:

Films, Tungsten borides, SPS – sintering, Pulsed laser ablation/deposition

Affiliations:
Mościcki T.-IPPT PAN
Radziejewska J.-IPPT PAN
Hoffman J.-IPPT PAN
Chrzanowska J.-IPPT PAN
Levintant-Zayonts N.-IPPT PAN
Garbiec D.-other affiliation
Szymański Z.-IPPT PAN
3.Garbiec D., Jurczyk M., Levintant-Zayonts N., Mościcki T., Properties of Al–Al2O3 composites synthesized by spark plasma sintering method, ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING, ISSN: 1644-9665, DOI: 10.1016/j.acme.2015.02.004, Vol.15, No.4, pp.933-939, 2015
Abstract:

This work presents fabrication and characterization of Al–Al2O3 composite materials with a 5%, 10%, 15% and 20% volume fraction of reinforcing phase particles. The spark plasma sintering method was applied for the purpose of fabricating these materials. The obtained Al–Al2O3 composites were characterized with an porosity from 1.27% to 5.07%. It was proven that as the content of hard ceramic particles increases in the composite, its density, hardness, and compression as well as tensile strength increase. The conducted study showed that a composite with 20% alumina content is characterized by a larger hardness (1355 MPa) and compression strength (247 MPa).

Keywords:

Spark plasma sintering, Composite material, Aluminum, Alumina

Affiliations:
Garbiec D.-other affiliation
Jurczyk M.-other affiliation
Levintant-Zayonts N.-IPPT PAN
Mościcki T.-IPPT PAN
4.Takeda K., Matsui R., Tobushi H., Homma S., Levintant-Zayonts N., Kucharski S., Enhancement of bending fatigue life in TiNi shape-memory alloy tape by nitrogen ion implantation, ARCHIVES OF MECHANICS, ISSN: 0373-2029, Vol.67, No.4, pp.293-310, 2015
Abstract:

A shape-memory alloy (SMA) is expected to be applied as intelligent or smart material since it shows the functional characteristics of the shape memory effect and superelasticity. Most SMA elements, with these characteristics, perform cyclic motions. In these cases, the fatigue property of SMA is one of the most important issues in view of evaluating functional characteristics of SMA elements. The fatigue properties are complex since they depend on stress, strain, temperature and their hysteresis. If an SMA is implanted with high-energy ions, the thermomechanical properties of the material may change, resulting in long fatigue life. In the present study, the nitrogen ion implantation was applied to modify the surface of a TiNi SMA tape and the influence of implantation treatment on the bending fatigue properties was investigated.

Keywords:

shape-memory alloy, titanium-nickel alloy, superelasticity, nitrogen ion implantation, fatigue, bending

Affiliations:
Takeda K.-Aichi Institute of Technology (JP)
Matsui R.-Aichi Institute of Technology (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Homma S.-Nippon Trex Co. (JP)
Levintant-Zayonts N.-IPPT PAN
Kucharski S.-IPPT PAN
5.Kucharski S., Levintant-Zayonts N., Luckner J., Mechanical response of nitrogen ion implanted NiTi shape memory alloy, MATERIALS AND DESIGN, ISSN: 0261-3069, DOI: 10.1016/j.matdes.2013.11.056, Vol.56, pp.671-679, 2014
Abstract:

In the paper a change of material (mechanical) parameters of NiTi shape memory alloy subjected to ion implantation treatment is investigated. The spherical indentation tests in micro- and nano-scale and tension test have been performed to study an evolution of local superelastic effect in different volumes of nonimplanted and nitrogen ion implanted NiTi alloy. The differential scanning calorimetry has been applied to measure the change of characteristic temperatures due to ion implantation treatment. The structure of implanted material has been investigated using electron microscopy technique. It has been found that the ion implantation process changes the properties not only in a thin surface layer but also in bulk material. In the layer the pseudoelastic effect is destroyed, and in the substrate is preserved, however its parameters are changed. The characteristic phase transformation temperatures in substrate are also modified.

Keywords:

Ion implantation, NiTi shape memory alloy, Micro- nano-indentation

Affiliations:
Kucharski S.-IPPT PAN
Levintant-Zayonts N.-IPPT PAN
Luckner J.-IPPT PAN
6.Pogrebnjak A.D., Bratushka S.N., Beresnev V.M., Levintant-Zayonts N., Shape memory effect and superelasticity of titanium nickelide alloys implanted with high ion doses, RUSSIAN CHEMICAL REVIEWS, ISSN: 0036-021X, DOI: 10.1070/RC2013v082n12ABEH004344, Vol.82, No.12, pp.1135-1159, 2013
Abstract:

The state of the art in ion implantation of superelastic NiTi shape memory alloys is analyzed. Various technological applications of the shape memory effect are outlined. The principles and techiques of ion implantation are described. Specific features of its application for modification of surface layers in surface engineering are considered. Key properties of shape memory alloys and problems in utilization of ion implantation to improve the surface properties of shape memory alloys, such as corrosion resistance, friction coefficient, wear resistance, etc. are discussed.

Affiliations:
Pogrebnjak A.D.-Sumy State University (UA)
Bratushka S.N.-Sumy State University (UA)
Beresnev V.M.-Charkowski Uniwersytet (UA)
Levintant-Zayonts N.-IPPT PAN
7.Takeda K., Mitsui K., Tobushi H., Levintant-Zayonts N., Kucharski S., Influence of nitrogen ion implantation on deformation and fatigue properties of TiNi shape memory alloy wire, ARCHIVES OF MECHANICS, ISSN: 0373-2029, Vol.65, No.5, pp.391-405, 2013
Abstract:

A shape memory alloy (SMA) is expected to be applied as intelligent material since it shows the unique characteristics of the shape memory effect and superelasticity. Most SMA elements, with these characteristics, perform cyclic motions. In these cases, fatigue of SMA is one of the important properties in view of evaluating functional characteristics. The fatigue properties are complex since they depend on stress, strain, temperature and time. If SMA is implanted by high energy ions, the thermomechanical properties may change, resulting in long fatigue life. In the present study, the nitrogen ion implantation was applied to modify TiNi SMA wire surface and the influence of implantation treatment on the tensile deformation and bending fatigue properties was investigated.

Keywords:

shape memory effect, titanium-nickel alloy, nitrogen ion implantation, superelasticity, fatigue

Affiliations:
Takeda K.-Aichi Institute of Technology (JP)
Mitsui K.-Masupuro Denkoh Corp. (JP)
Tobushi H.-Aichi Institute of Technology (JP)
Levintant-Zayonts N.-IPPT PAN
Kucharski S.-IPPT PAN
8.Pogrebnjak A.D., Bratushka S.N., Levintant-Zayonts N., High Dose Ion Implantation Into NiTi for Improvement of Pseudoplasticity and Shape Memory Effect, Journal of Nano- and Electronic Physics, ISSN: 2077-6772, Vol.5, No.1, pp.01016-1-8, 2013
Abstract:

New investigation results of N +, Mo, W, N and Ni high dose ion implantation of 1018cm – 2 influence on alloys physical and mechanical properties are presented in this article. Increasing of alloys wear resistance by abrasion of the surface layer, increasing of nanohardness, corrosion resistance, and changes of surface NiTi morphology are obtained. The correlation between the change of the elemental composition (after implantation) and the increase in mechanical properties of the alloy is observed. In other words, a nanostructure of oxycarbides and oxynitrides is formed in the surface layer as a result of high-dose ion implantation, which improves wear resistance, corrosion resistance and nanohardness of material. At the same time, the bulk properties of NiTi after implantation (pseudoplasticity and shape memory effect) do not change, which makes ion implantation an effective tool for improvement materials properties.

Keywords:

Implantation, NiTi, Shape memory effect, Pseudoelastic, Properties

Affiliations:
Pogrebnjak A.D.-Sumy State University (UA)
Bratushka S.N.-Sumy State University (UA)
Levintant-Zayonts N.-IPPT PAN
9.Swiatek Z., Michalec M., Levintant-Zayonts N., Bonarski J., Budziak A., Bonchyk O., Savitskij G., Structural Evolution of Near-Surface Layers in NiTi Alloy Caused by an Ion Implantation, ACTA PHYSICA POLONICA A, ISSN: 0587-4246, Vol.120, No.1, pp.75-78, 2011
Abstract:

The results of X-ray diffraction studies on structural changes in the near-surface layers in the NiTi alloy caused by nitrogen-ion implantation with the energy E = 50 keV and the fluence D = 1018cm°2 are presented. X-ray diffractometry, using the Philips diffractometer type X’Pert in the Bragg–Brentano geometry, was used to identify the phase composition of NiTi alloy. For layer by layer analysis of structural changes in the near-surface layers, the D8 Discover Bruker diffractometer with polycapilar beam optics was used. The ion-implanted NiTi alloy in the near-surface layer exhibits five phases: the dominating austenite phase, two martensitic phases and a small amount of the Ni4Ti3 and NTi phases. Along with the decreasing thickness of the near-surface layer investigated in material an increasing fraction of the Ni4Ti3 and NTi phases was observed. With the thickness of this layer about 340 nm, besides still existing the austenite, Ni4Ti3 and NTi phases, only one martensitic phase is present in the alloy. Further decrease of the thickness of the near-surface layer to about 170 nm leads to the increasing fraction of the Ni4Ti3 and NTi phases.

Keywords:

X-ray diffraction, ion implantation, shape memory alloy, nitinol, phase composition

Affiliations:
Swiatek Z.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Michalec M.-Jagiellonian University (PL)
Levintant-Zayonts N.-IPPT PAN
Bonarski J.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Budziak A.-other affiliation
Bonchyk O.-Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
Savitskij G.-Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
10.Levintant-Zayonts N., Kucharski S., Influence of High Fluence Nitrogen Ion Implantation on Pseudoelastic Behaviour of NiTi Shape Memory Alloy, ACTA PHYSICA POLONICA A, ISSN: 0587-4246, Vol.120, No.1, pp.79-82, 2011
Abstract:

An attempt to evaluate mechanical properties changes (superelastic phenomena) in the shape memory NiTi alloy (austenitic form) due to ion implantation (N+, fluences of 1x10^17 and 4x10^18 cm-2 ) has been made. We applied the differential scanning calorimetry technique and spherical indentation (micro- and nanoindentation scale) test to study superelastic effect. The results of investigations of selected functional properties, i.e. characteristic temperatures, total and recovered penetration depth on the implanted and non-implanted NiTi samples are presented.

Keywords:

superelastic phenomena, shape memory alloy, nitinol, nitrogen ion implantation

Affiliations:
Levintant-Zayonts N.-IPPT PAN
Kucharski S.-IPPT PAN
11.Levintant-Zayonts N., Kucharski S., Lokalny efekt pamięci kształtu w stopie NiTi przed i po implantacji jonowej, INŻYNIERIA MATERIAŁOWA, ISSN: 0208-6247, Vol.183, No.5, pp.855-861, 2011
Abstract:

W przedstawionej pracy zastosowano metodę implantacji jonowej (jako techniki konstytuowania warstw wierzchnich) do modyfikacji własności stopu z pamięcią kształtu (SMA-Shape Memory Alloy) NiTi (w postaci martenzytycznej). Przedmiotem badań było określenie zmian własności kompozytu „warstwa implantowana+rdzeń” (rys. 2) po implantacji azotem (1x1018j/cm2, 65keV) na stopie NiTi oraz określenie wpływu implantacji jonowej na własności lokalnego efektu pamięci kształtu (EPK). Przedstawiono badania wybranych charakterystyk funkcjonalnych: temperatur charakterystycznych implantowanego stopu NiTi, a także zmian trwałych odkształceń w zależności od temperatury. Wykorzystano test mikroindentacji i profilometrii skaningowej. Metodą transmisyjnej mikroskopii elektronowej (TEM) badano mikrostrukturę stopu NiTi, a pomiary RBS zastosowano do oszacowania profili rozkładów pierwiastków po implantacji jonowej. W pracy potwierdzono, że zachowanie materiału NiTi bardzo zależy od temperatury. Pokazano, również, że test wgniatania wgłębnika kulistego w powierzchnie może posłużyć do identyfikacji implantowanej warstwy.



Keywords:

implantacja jonowa, efekt pamięci kształtu, stopy z pamięcią kształtu, indentacja

Affiliations:
Levintant-Zayonts N.-IPPT PAN
Kucharski S.-IPPT PAN
12.Swiatek Z., Levintant-Zayonts N., Michalec M., Czeppe T., Lipinski M., Bonchyk O., Savitskij G., Creation of wear-resistant near-surface-layers with inhomogeneous structure on NiTi alloy by ion implantation technology, Physics Procedia, ISSN: 1875-3892, DOI: 10.1016/j.phpro.2010.11.077, Vol.10, pp.69-76, 2010
Abstract:

In the present study we report the changes in the modified near-surface layer on NiTi shape memory alloy, caused by ion implantation as well as their influence on the structure and mechanical properties of this material. Experimental results of an inhomogeneous structure and tribological properties of implanted NiTi are discussed in this paper.

Keywords:

shape memory NiTi alloy, Ion implantation, DSC, X-ray diffractometry, TEM

Affiliations:
Swiatek Z.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Levintant-Zayonts N.-IPPT PAN
Michalec M.-Jagiellonian University (PL)
Czeppe T.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Lipinski M.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Bonchyk O.-Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
Savitskij G.-Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
13.Czeppe T., Levintant-Zayonts N., Swiatek Z., Michalec M., Bonchyk O., Savitskij G., Inhomogeneous structure of near-surface layers in the ion-implanted niti alloy, VACUUM, ISSN: 0042-207X, DOI: 10.1016/j.vacuum.2009.01.066, Vol.83, No.Supplement 1, pp.S214-S219, 2009
Abstract:

This paper reports the application of nitrogen ion implantation for modification of a shape memory alloy. It is known that the problem of creating a protective surface coating for the shape memory alloy is the most acute for potential applications of this material. Thus, the problem of increasing surface protective properties and, at the same time, simultaneous preservation of functional properties of shape memory materials is a subject of research and development [Pelletier H, Muller D, Mille P, Grob J. Surf Coat Technol 2002;158:309.]. The surface characterization of nitrogen implanted (fluence 1018 cm−2 and energy 50 keV) equiatomic commercial NiTi alloy samples was performed with the assistance of high resolution transmission electron microscopy (HTEM) techniques and modifications of phase composition before and after irradiation are studied at room and martensitic transformation temperatures by X-ray diffraction methods. Differential scanning calorimetry (DSC, TA Instruments) was used to characterize the transformation sequence and transformation temperatures for the initial and surface-modified materials. Experimental results of an inhomogeneous structure of near-surface layers in the ion-implanted NiTi alloy are discussed in this paper

Keywords:

Shape memory NiTi alloy, Ion implantation, DSC, X-ray diffractometry, TEM

Affiliations:
Czeppe T.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Levintant-Zayonts N.-IPPT PAN
Swiatek Z.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Michalec M.-Jagiellonian University (PL)
Bonchyk O.-Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
Savitskij G.-Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
14.Levintant-Zayonts N., Kucharski S., Surface characterization and wear behavior of ion implanted NiTi shape memory alloy, VACUUM, ISSN: 0042-207X, DOI: 10.1016/j.vacuum.2009.01.068, Vol.83, No.Supplement 1, pp.S220-S223, 2009
Abstract:

The aim of this study was investigation of changes in the modified near-surface layer on the NiTi shape memory alloy, caused by ion implantation as well as their influence on the mechanical and shape memory properties of this material. Surface of NiTi has been modified by nitrogen ion beam at several fluences 1 × 1017 cm−2, 1 × 1018 cm−2 and 2 × 1018 cm−2 at the energy 50 keV. The effect of implantation parameters on surface characteristics and wear properties was investigated using dry-sliding-wear test, depth sensing indentation test and scanning profilometry method. The experimental results have shown how the ion implantation treatment can change the original surface: reducing Ni content in the surface, increasing the surface hardness (furthermore, the hardness improvement extended to the regions much deeper than the implanted layer), and improving the sliding wear resistance. The experimental results of surface treatment conditions and mechanical properties of the modified NiTi alloys are compared, analyzed and discussed in this paper.

Keywords:

Shape memory NiTi alloy, Ion implantation, Wear, Surface characterization

Affiliations:
Levintant-Zayonts N.-IPPT PAN
Kucharski S.-IPPT PAN
15.Pogrebnjak A.D., Bratushka S.N., Uglov V., Rusakov V., Beresnev V.M., Anischik V., Malikov L.V., Levintant-Zayonts N., Structures and properties of Ti alloys after double implantation, VACUUM, ISSN: 0042-207X, DOI: 10.1016/j.vacuum.2009.01.072, Vol.83, No.Supplement 1, pp.S240-S244, 2009
Abstract:

The paper presents new results on investigation of structure and physical-mechanical properties of near surface layers of titanium alloys after (W+, Mo+) ion implantation and subsequent thermal annealing under 550 °C for 2 h. Using back scattering (RBS) of helium ions and protons, scanning electron microscopy (SEM) with microanalysis (EDS), (WDS), proton (ion) induced X-ray emission (PIXE), X-ray phase analysis (XRD) with a grazing incidence geometry (0.5° angle), measurements of nanohardness and elastic modulus, friction wear (cylinder-plate), measurements of corrosion resistance in a salt solution, we investigated the VT-6 samples, and determined their fatigue resistance under cyclic loads. Double increase of hardness, decrease of wear and increased fatigue resistance were found, which was related to the formation of small dispersion (nanodimension) nitride, carbonitride, and intermetalloid phases

Keywords:

Implantation, Structure, Ti alloys, Composition, Hardness

Affiliations:
Pogrebnjak A.D.-Sumy State University (UA)
Bratushka S.N.-Sumy State University (UA)
Uglov V.-other affiliation
Rusakov V.-other affiliation
Beresnev V.M.-Charkowski Uniwersytet (UA)
Anischik V.-other affiliation
Malikov L.V.-other affiliation
Levintant-Zayonts N.-IPPT PAN
16.Pogrebnjak A.D., Bratushka S.N., Malikov L.V., Levintant-Zayonts N., Erdybaeva N.K., Plotnikov S.V., Gritsenko B.P., Effect of high doses of N+, N+ + Ni+, and Mo+ + W+ ions on the physicomechanical properties of tini, TECHNICAL PHYSICS, ISSN: 1063-7842, DOI: 10.1134/S1063784209050107, Vol.54, No.5, pp.667-673, 2009
Abstract:

The surface layer of an equiatomic TiNi alloy, which exhibits the shape memory effect in the martensitic state, is modified with high-dose implantation of 65-keV N+ ions (the implantation dose is varied from 1017 to 1018 ions/cm2). TiNi samples are implanted by N+, Ni+-N+, and Mo+-W+ ions at a dose of 1017–1018 cm−2 and studied by Rutherford backscattering, scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction (glancing geometry), and by measuring the nanohardness and the elastic modulus. A Ni+ concentration peak is detected between two maxima in the depth profile of the N+ ion concentration. X-ray diffraction (glancing geometry) of TiNi samples implanted by Ni+ and N+ ions shows the formation of the TiNi (B2), TiN, and Ni3N phases. In the initial state, the elastic modulus of the samples is E = 56 GPa at a hardness of H = 2.13 ± 0.30 GPa (at a depth of 150 nm). After double implantation by Ni+-N+ and W+-Mo+ ions, the hardness of the TiNi samples is ∼2.78 ± 0.95 GPa at a depth of 150 nm and 4.95 ± 2.25 GPa at a depth of 50 nm; the elastic modulus is 59 GPa. Annealing of the samples at 550°C leads to an increase in the hardness to 4.44 ± 1.45 GPa and a sharp increase in the elastic modulus to 236 ± 39 GPa. A correlation between the elemental composition, microstructure, shape memory effect, and mechanical properties of the near-surface layer in TiNi is found.

Keywords:

double ion implantation, nitinol, shape mempry effect, nanohardness, elastic modulus

Affiliations:
Pogrebnjak A.D.-Sumy State University (UA)
Bratushka S.N.-Sumy State University (UA)
Malikov L.V.-other affiliation
Levintant-Zayonts N.-IPPT PAN
Erdybaeva N.K.-other affiliation
Plotnikov S.V.-other affiliation
Gritsenko B.P.-other affiliation
17.Levintant-Zayonts N., Kucharski S., Analiza zmian pseudosprężystych własności stopu NiTi z pamięcią kształtu spowodowanych implantacją jonową, INŻYNIERIA MATERIAŁOWA, ISSN: 0208-6247, Vol.1, pp.45-53, 2009
Abstract:

Stopy z osnową NiTi należą do grupy najlepszych materiałów z pamięcią kształtu [1]. Szeroki zakres zastosowań w medycynie i technice [2], [3], [4] powoduje zwiększenie roli stanu ich powierzchni. Zagadnienia modyfikacji powierzchni stopu NiTi w kontekście polepszenia jej charakterystyk – z jednej strony, i zachowania funkcjonalnych własności (efektu pamięci kształtu i pseudosprężystości) z drugiej strony, - stawiane są coraz częściej [6], [7]. W przedstawianej pracy jest pokazana próba oceny zmian własności mechanicznych stopu NiTi implantowanego azotem (zakres dawek 1x1017–3x1018j/cm2). Wykorzystano test mikroindentacji. Przedstawiono badania wybranych charakterystyk funkcjonalnych, głównie zmian odkształceń odzyskiwanych i trwałych, a także temperatur charakterystycznych implantowanego topu NiTi w warunkach pokojowej i podwyższonej temperatury.

Keywords:

stopy z pamięcią kształtu, implantacja jonowa, pseudospręzystość

Affiliations:
Levintant-Zayonts N.-IPPT PAN
Kucharski S.-IPPT PAN
18.Pogrebnjak A.D., Bratushka S.N., Malikov L.V., Levintant-Zayonts N., Erdybaeva N.K., Plotnikov S.V., Gritsenko B.P., Wlijanije wysokich doz ionow N+, N++ Ni+, Mo++ W+ na fizikomechaniczeskije swojstwa TiNi, Журнал технической физики, ISSN: 0044-4642, Vol.79, No.5, pp.65-72, 2009
Abstract:

Поверхностный слой эквиатомного сплава TiNi, обладающего эффектом памяти формы в мартенситном состоянии, был модифицирован при помощи высокодозной имплантации ионов N+ с энергией 65keV (доза имплантации составила от 1017 до 1018 ion/cm2). С помощью методов резерфордовского обратного рассеяния ионов (RBS), растровой электронной микроскопии с микроанализом (SEM и EDS),метода XRD в скользящей геометрии, а также измерения нанотвердости и модуля упругости исследовались образцы TiNi после имплантации ионов N+,Ni+−N+,Mo+−W+ дозами от 1017 до ∼1018 cm−2. Между двумя максимумами концентрационного профиля ионов N+ обнаружен пик концентрацииионов Ni+. XRD-анализ в скользящей геометрии образцов TiNi после имплантации ионов Ni+ и N+ показал образование фаз TiNi(B2);TiN; Ni3N. Исследования механических характеристик образцов показали, что висходном состоянии модуль упругости образцов составлял E=56 GPa при твердости H=2.13±0.3 GPa (на глубине 150 nm). После двойной имплантации ионов Ni+−N+, W+−Mo+ твердость образцов TiNi на глубине 150 nm составляла∼2.78±0.95 GPa, а на глубине 50 nm ее значение возросло до 4.95±2.25 GPa при модуле упругости 59 GPa. Отжиг образцов при 550◦C привел к увеличению твердости до 4.44±1.45 GPa и резкому увеличению модуля упругости до значения 236±39 GPa. Обнаружена корреляция между элементным составом, микроструктурой, эффектом памяти формы и механическими свойствами приповерхностного слоя TiNi

Affiliations:
Pogrebnjak A.D.-Sumy State University (UA)
Bratushka S.N.-Sumy State University (UA)
Malikov L.V.-other affiliation
Levintant-Zayonts N.-IPPT PAN
Erdybaeva N.K.-other affiliation
Plotnikov S.V.-other affiliation
Gritsenko B.P.-other affiliation
19.Pogrebnjak A.D., Bratushka S.N., Levintant-Zayonts N., Influence of double implantation of Ni and N ions on physical properties of TiNi, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.84, No.3, pp.191-193, 2008
Abstract:

Wykonano badania metoda RBS z zastosowaniem jonów N+ i Ne+ rozkładów pierwiastków w NiTi po dużych dawkach implantacji jonów N+(1018 cm-2) oraz podwójnej implantacji jonów N+ (1018 cm-2) i Ni+ (5x1017cm-2). Zaobserwowano obecność dwóch maksimów rozkładu atomów azotu, spowodowaną obecnością atomów Ni. Zjawisko to nie było zaobserwowane po implantacji samych jonów N+. Na skutek obecności atomów Ni powstają naprężenia ściskające, które powodują migrację jonów N poza obszar maksimum rozkładu jonów Ni. Na powierzchni implantowanych próbek NiTi powstają kratery o różnych wymiarach, spowodowane jej rozpylaniem podczas implantacji dużych dawek jonów N+ i Ni+.

Keywords:

RBS, tytan, jony N, jony Ni, implantacja jonowa

Affiliations:
Pogrebnjak A.D.-Sumy State University (UA)
Bratushka S.N.-Sumy State University (UA)
Levintant-Zayonts N.-IPPT PAN
20.Yaskiv O., Pohreliuk I., Fedirko V., Kravchyshyn T., Levintant-Zayonts N., Surface modification of Ti-6Al-4V alloy by nitriding and subsequent nitrogen ion implantation, INŻYNIERIA MATERIAŁOWA, ISSN: 0208-6247, Vol.163, No.3, pp.134-137, 2008
Abstract:

In present paper the aspects of complex nitriding of titanium alloys by two methods (thermodiffusion saturation and implantation with nitrogen) were examined. Before implantation both thin oxynitride and thick nitride layers have been formed on the Ti-6A1-4V alloy surface (Fig.l). It was shown that nitrogen implantation allows to modify the coatings. Qualitative and quantitative character of changes is determined by the structural and phase state of titanium surface layer achieved previously. It was investigated that nitrogen implantation improves the surface microhardness both nitride and oxynitride coatings (Fig. 5, 6). Our results reveal that the surface hardening without losses of its quality can be achieved by the implantation of nitrogen in oxynitride layer.

Keywords:

Ti6Al4V alloy, thermodiffusion saturation, ion implantation treatment

Affiliations:
Yaskiv O.-other affiliation
Pohreliuk I.-other affiliation
Fedirko V.-other affiliation
Kravchyshyn T.-other affiliation
Levintant-Zayonts N.-IPPT PAN
21.Levintszewski-Zayonts N., Analysis of the mechanical and shape memory behavior of nitrogen ion-implanted NiTi alloy., VACUUM, ISSN: 0042-207X, DOI: 10.1016/j.vacuum.2007.01.058, Vol.81, No.10, pp.1283-1287, 2007
Abstract:

Experimental results of an accumulation and return strain behaviour of the modified surface of NiTi alloy , as well mechanical and shape memory behaviour, are shown in this paper.
Surface of equiatomic NiTi shape memory alloy (in martensitic form) has been modified by high dose ion implantation technique using nitrogen ion beam. The low-energy (65 keV) and following high doses have been used: 1x1017j/cm2, 5x1017j/cm2, 1x1018j/cm2. Correlation between subsurface layers elemental composition of NiTi alloy, microstructure and shape memory properties is shown.


Keywords:

ion implantation, Shape memory effect, Differential Scanning Calorimetry (DSC), NiTi alloy, indentation test

Affiliations:
Levintszewski-Zayonts N.-IPPT PAN

Conference abstracts
1.Levintant-Zayonts N., Kwiatkowski L., Swiatek Z., Brzozowska J., Local pseudoelastic behavior and surface characteristics of N ion implanted NiTi shape memory alloy, ION 2016, XI International Conference ION IMPLANTATION AND OTHER APPLICATIONS OF IONS AND ELECTRONS, 2016-06-13/06-16, Kazimierz Dolny (PL), pp.73, 2016
2.Izhnin I., Voitsekhovskii A., Korotaev A., Fitsych O., Bonchyk O., Savytskyy H., Mynbaev K., Varavin V., Dvoretsky S., Mikhailov N., Yakushev M., Jakiela R., Levintant-Zayonts N., Electrical and optical properties of arsenic - implanted Cdx Hg1-x Te MBE films, ION 2016, XI International Conference ION IMPLANTATION AND OTHER APPLICATIONS OF IONS AND ELECTRONS, 2016-06-13/06-16, Kazimierz Dolny (PL), pp.72, 2016
3.Levintant-Zayonts N., Kwiatkowski L., The effect of nitrogen ion implantation on mechanical and corrosion properties of NiTi alloy, APCS-2015, XVIII Ogólnopolskie Sympozjum Naukowo - Techniczne “Nowe Osiągnięcia w Badaniach i Inżynierii Korozyjnej”, 2015-11-18/11-20, Poraj (PL), Vol.58, No.11s/A/2015, pp.1, 2015
Abstract:

Due to superelasticity phenomena, shape memory effect and durability in many environments NiTi shape memory alloys (SMAs) are being intensively adapted for biomedical applications. However, high Ni concentration and its possible release from the surface create a problem of negative effects on biological environment. Therefore a number of surface treatments has been proposed to stabilize a surface passive layer and inhibit Ni dissolution. The main goal of the proposed article is to present results of the effect of nitrogen ion implantation on mechanical and corrosion properties of equiatomic commercial NiTi SMA. Mechanical properties (local superelasticity phenomena) of NiTi samples were determined using ultra-low load indentation system. The differential scanning calorimetry was applied to measure the change of characteristic temperatures due to ion implantation treatment. The load–penetration depth curves show that the lower of applied nitrogen doses improve mechanical properties in the near-surface layer of NiTi. Corrosion resistance of implanted samples carried out in Ringer solution was evaluated by means of electrochemical methods. The results of potentiodynamic measurements in anodic range of polarization curves for implanted samples indicated a decrease of current density in passive range in comparison with non-treated NiTi sample. Therefore an inhibition of Ni release from the alloy can be expected. The results of impedance measurements recorded at the corrosion potential show a capacitive behaviour for all samples without clear predominance of one of them. It can be explained by the fact that this result concerns the case of general corrosion in the beginning of exposition. Prolonged exposition gives rise to the occurrence of local corrosion. It is shown in this work that nitrogen ion implantation (fluences 1017- 1018 ion/cm2, energy 50 keV) leads to a creation of modified surface of improved physicochemical properties with unchanged shape memory effect.

Keywords:

shape memory alloy(SMA), nitinol, ion implantation, superelasticity, corrosion resistance

Affiliations:
Levintant-Zayonts N.-IPPT PAN
Kwiatkowski L.-other affiliation
4.Mościcki T., Hoffman J., Radziejewska J., Chrzanowska J., Levintant-Zayonts N., Garbiec D., Formation of WB4 thin films using nanosecond Nd-YAG laser, KKNM, 4th National Conference on Nano- and Micromechanics, 2014-07-08/07-10, Wrocław (PL), pp.152-154, 2014
Abstract:

Inexpensive Tungsten Tetraboride super hard coatings prepared by pulsed laser deposition (PLD) method are investigated. WB4 coatings were prepared on Si (100), by PLD technique using nanosecond, Nd:YAG laser operating at 355 nm wavelenght. Additionally the surface of SPS sintered WBx target before and after ablation process was examined. Phase change of WB2 to WB4 at the surface of target is observed. The phase analysis, crystallography and orientations have been studied using X-ray diffractometry. The surface layer of target after ablation and deposited films are found to be mostly WB4 phase with hardness HV>28 GPa.

Keywords:

laser mikro/nano engineering, thin films, pulsed laser ablation/deposition, tungsten tetraboride WB4

Affiliations:
Mościcki T.-IPPT PAN
Hoffman J.-IPPT PAN
Radziejewska J.-IPPT PAN
Chrzanowska J.-IPPT PAN
Levintant-Zayonts N.-IPPT PAN
Garbiec D.-other affiliation
5.Takeda K., Matsui R., Tobushi H., Levintant-Zayonts N., Kucharski S., Deformation and fatigue properties of nitrogen ion implanted TiNi shape memory alloy, SolMech 2014, 39th Solid Mechanics Conference, 2014-09-01/09-05, Zakopane (PL), pp.269-270, 2014