Structure and wear properties of NiTi modified by nitrogen plasma immersion ion implantation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Xiangmei Liu
  • Shuilin Wu
  • Y. L. Chan
  • C. L. Chu
  • K. W K Yeung
  • W. W. Lu
  • K. M C Cheung
  • K. D K Luk

Detail(s)

Original languageEnglish
Pages (from-to)192-197
Journal / PublicationMaterials Science and Engineering A
Volume444
Issue number1-2
Publication statusPublished - 25 Jan 2007

Abstract

NiTi shape memory alloy samples were plasma-implanted with nitrogen at voltages ranging from -10 to -40 kV. X-ray photoelectron spectroscopy results disclose the formation of gradient TiN layers which thicknesses and elemental in-depth distributions depend on the applied voltages. The effects of the implantation voltages on the wear characteristics were investigated by pin-on-disk tests. In the initial period of our friction test, the implanted samples exhibit low friction coefficients compared to the untreated sample. The wear resistance of the plasma-implanted NiTi samples increases with implantation voltages and decreases with the applied loads. Our results reveal that the wear mechanism of the implanted samples is adhesive-dominant under low applied loads but becomes abrasive-dominant at high applied loads. © 2006 Elsevier B.V. All rights reserved.

Research Area(s)

  • Nickel titanium shape memory alloy, Plasma immersion ion implantation, Structure, Wear

Citation Format(s)

Structure and wear properties of NiTi modified by nitrogen plasma immersion ion implantation. / Liu, Xiangmei; Wu, Shuilin; Chan, Y. L.; Chu, Paul K.; Chung, C. Y.; Chu, C. L.; Yeung, K. W K; Lu, W. W.; Cheung, K. M C; Luk, K. D K.

In: Materials Science and Engineering A, Vol. 444, No. 1-2, 25.01.2007, p. 192-197.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal