Effect of working pressure on the structure and the electrochemical corrosion behavior of diamond-like carbon (DLC) coatings on the NiTi alloys

被引：31

作者：

Cai, W.

Sui, J. H.

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Jiamusi Univ, Sch Mat Sci & Engn, Jiamusi 154007, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2007年 / 201卷 / 9-11期

基金：

中国国家自然科学基金;

关键词：

NiTi alloys; diamond-like carbon; plasma immersion ion implantation and deposition; corrosion resistance;

D O I：

10.1016/j.surfcoat.2006.07.164

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

DLC coatings with different working pressure (2 x 0(-2), 6 x 10(-2) and 8 x 10(-2) Pa) were deposited on polished NiTi alloys by plasma immersion ion implantation and deposition (PIIID) using graphite as plasma source. The results of Raman spectra and X-ray photoelectron spectroscopy (XPS) indicate the sp(3)/sp(2) ratio is decreased with the increase of the working pressure. The cross-section microstructure of the DLC coated NiTi alloys indicates that the DLC coating is dense and compact. The corrosion results show that the corrosion resistance of the NiTi alloys is improved by the DLC coating, and the corrosion resistance of the DLC coatings on the NiTi alloys is decreased with the increase of the working pressure. It can be concluded that the sp(3)/sp(2) ratio has obvious effect on the corrosion resistance of the DLC coatings. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：5194 / 5197

页数：4

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