Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 267, Issue 15, Pages 2475-2479Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2009.05.049
Keywords
NiTi alloys; Fluorinated diamond-like carbon films; Plasma immersion ion implantation and deposition; Corrosion resistance
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Funding
- National Natural Science Foundation of China [50801018]
- Development Program for Outstanding Young Teachers in Harbin Institute of Technology [HITQNJS.2007.015]
- The Natural Scientific Research Innovation Foundation in Harbin Institute of Technology [HIT.NSRIF.2008.34]
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Fluorinated diamond-like carbon (F-DLC) films with different CF(4) flux were deposited on polished NiTi alloys by plasma immersion ion implantation and deposition (PIIID). The results show CF(x) bond is formed in the F-DLC films. With the increase of the CF(4) flux, the fluorine content and surface hydrophilicity of the F-DLC films are increased, while their sp(3)/sp(2) ratio and surface roughness are decreased. The F-DLC films improve the surface corrosion resistance of NiTi alloys, and the corrosion resistance of the F-DLC films on the NiTi alloys first increase and then decrease with increasing the CF(4) flux. Moreover, the relationship between the corrosion resistance and its structure and surface hydrophilicity of the F-DLC films is also clarified. (C) 2009 Elsevier B.V. All rights reserved.
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