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2011 | 120 | 1 | 75-78
Article title

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

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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
Contributors
author
  • Institute of Metallurgy and Materials Science, PAS, Reymonta 25, 30-059 Kraków, Poland
author
  • Jagiellonian University, Ingardena 3, 30-069 Kraków, Poland
  • Institute of Fundamental Technological Research, PAS, Pawińskiego 5B, 02-106 Warsaw, Poland
author
  • Institute of Metallurgy and Materials Science, PAS, Reymonta 25, 30-059 Kraków, Poland
author
  • Niewodniczański Institute of Nuclear Physics, PAS, E. Radzikowskiego 152, 31-342 Kraków, Poland
author
  • Institute for Applied Problems of Mechanics and Mathematics NASU, Naukova 5, 79 601 Lviv, Ukraine
author
  • Institute for Applied Problems of Mechanics and Mathematics NASU, Naukova 5, 79 601 Lviv, Ukraine
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv120n119kz
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