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Fabrication of (Ti-O-N-Si)/Ti Composite Coating on NiTi Shape Memory Alloy Using PIIID and Coating Evaluation

Published online by Cambridge University Press:  31 January 2011

Tao Sun ,
Langping Wang  and
Min Wang
Tao Sun
Affiliation:
[email protected], The University of Hong Kong, Mechanical Engineering, Hong Kong, China
Langping Wang
Affiliation:
[email protected], Harbin Institue of Technology, Welding Science and Engineering, Harbin, Hei Long Jiang, China
Min Wang
Affiliation:
[email protected], The University of Hong Kong, Mechanical Engineering, Hong Kong, Hong Kong
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Abstract

A compact and uniform (Ti, Si, O, N)/Ti composite coating was fabricated on the surface of a NiTi shape memory alloy (SMA) (containing 50.8 at.% Ni) using plasma immersion ion implantation and deposition (PIIID) with radio-frequency (RF) magnetron sputtering. The coating and coated NiTi SMA were studied using various techniques. Analysis showed that the Ni content was drastically reduced on the surface of coated samples due to coating formation. This could greatly improve the biocompatibility of NiTi SMA. There was no TiO2 or TiN formation in the coating. The shape memory ability of NiTi SMA samples was no deteriorated by the coating process. The coating significantly improved the corrosion resistance and wear resistance of NiTi SMA and also rendered the material bioactive.

Keywords

biomaterialcoatingphysical vapor deposition (PVD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1239: Symposium VV – Micro- and Nanoscale Processing of Biomaterials , 2009 , 1239-VV02-04
Copyright
Copyright © Materials Research Society 2010

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