Partner: O. Bonchyk

Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)

Ostatnie publikacje
1.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

Streszczenie:

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.

Słowa kluczowe:

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

Afiliacje autorów:

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)
15p.
2.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

Streszczenie:

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.

Słowa kluczowe:

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

Afiliacje autorów:

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)
3.Misztal-Faraj B., Sajkiewicz P., Savytskyy H., Bonchyk O., Gradys A., Ziabicki A., Following phase transitions by depolarizing light intensity. The experimental setup, POLYMER TESTING, ISSN: 0142-9418, DOI: 10.1016/j.polymertesting.2008.09.012, Vol.28, pp.36-41, 2009

Streszczenie:

A new setup for light depolarization measurements was designed. Two innovative elements have been introduced. The first is an electronic system which enables depolarization ratio to be registered directly. The second is a system of temperature control allowing effective implementation of a temperature–time program according to the particular requirements. Direct registration of depolarization ratio instead of intensity of depolarized light for individual components (parallel and perpendicular), as is performed in the usual apparatus, allows elimination of light scattering effects because of the insensitivity of depolarization ratio to the scattering level. Application of the new setup was shown for crystallization and melting of isotactic polypropylene (i-PP). Comparison of phase transitions in i-PP, as registered by light depolarization and DSC, indicates some differences. Possible sources of the observed differences are discussed.

Słowa kluczowe:

Light depolarization, Polymers, Crystallization, Melting, Kinetics of phase transitions

Afiliacje autorów:

Misztal-Faraj B.-IPPT PAN
Sajkiewicz P.-IPPT PAN
Savytskyy H.-Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
Bonchyk O.-Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
Gradys A.-IPPT PAN
Ziabicki A.-IPPT PAN
32p.
4.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

Streszczenie:

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

Słowa kluczowe:

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

Afiliacje autorów:

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)
27p.

Abstrakty konferencyjne
1.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

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pdf
390382
2010-02-08
BUP 17/11
2011-08-16
Sajkiewicz P., Misztal-Faraj B., Savytskyy H., Bonchyk O., Ziabicki A., Gradys A.
Sposób i urządzenie do badania kinetyki przemian fazowych metodą pomiaru depolaryzacji światła
PL, Instytut Podstawowych Problemów Techniki PAN
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