Structural Evolution of Near-Surface Layers in NiTi Alloy Caused by an Ion Implantation

• Authors: Z. Swiatek , M. Michalec , N. Levintant-Zayonts , J. Bonarski , A. Budziak , O. Bonchyk , G. Savitskij
• Languages of publication: EN

Abstracts

EN

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 = 10^{18} cm^{-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 Ni_4Ti_3 and NTi phases. Along with the decreasing thickness of the near-surface layer investigated in material an increasing fraction of the Ni_4Ti_3 and NTi phases was observed. With the thickness of this layer about 340 nm, besides still existing the austenite, Ni_4Ti_3 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 Ni_4Ti_3 and NTi phases.

Keywords

EN

68.55.-a; 68.49.Uv

Discipline

• 68.49.Uv: X-ray standing waves
• 68.55.-a: Thin film structure and morphology(for methods of thin film deposition, film growth and epitaxy, see 81.15.-z)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 120
• Issue: 1
• Pages: 75-78

Dates

published

2011-07

Contributors

author

Z. Swiatek

• Institute of Metallurgy and Materials Science, PAS, Reymonta 25, 30-059 Kraków, Poland

author

M. Michalec

• Jagiellonian University, Ingardena 3, 30-069 Kraków, Poland

author

N. Levintant-Zayonts

• Institute of Fundamental Technological Research, PAS, Pawińskiego 5B, 02-106 Warsaw, Poland

author

J. Bonarski

• Institute of Metallurgy and Materials Science, PAS, Reymonta 25, 30-059 Kraków, Poland

author

A. Budziak

• Niewodniczański Institute of Nuclear Physics, PAS, E. Radzikowskiego 152, 31-342 Kraków, Poland

author

O. Bonchyk

• Institute for Applied Problems of Mechanics and Mathematics NASU, Naukova 5, 79 601 Lviv, Ukraine

author

G. Savitskij

• Institute for Applied Problems of Mechanics and Mathematics NASU, Naukova 5, 79 601 Lviv, Ukraine

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Identifiers

DOI

10.12693/APhysPolA.120.75