Effect of the DLC coating on the surface properties of the NiTi alloys

被引：0

作者：

Sui Jiehe ^{[1
]}

Wu Ye ^{[1
]}

Wang Zhixue ^{[1
]}

Cai Wei ^{[1
]}

Zhao Liancheng ^{[1
]}

机构：

[1] Harbin Inst Technol, Harbin 150001, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2007年 / 36卷 / 03期

关键词：

diamond-like carbon; NiTi shape memory alloys; novel plasma immersion ion implantation and deposition; electrochemical impedance spectroscopy; corrosion resistance;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Diamond-like carbon (DLC) film was fabricated on NiTi alloys surface adopting novel plasma immersion ion implantation and deposition (PIIID) at room temperature, using C2H2 as plasma source. Film structure was characterized by Raman spectroscopy. Film structure and hardness were characterized by nano-indentation, and XPS were used to study the surface mechanical properties and composition of the DLC coated and uncoated sample, respectively. The corrosion resistance in Hank's solution was evaluated by mean of potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS). The results show that the carbon coating on TiNi alloy surface is diamond-like carbon, and the elastic modulus and hardness of the alloys are increased by DLC coating. The surface composition of the NiTi alloys is changed from the TiO2 to DLC due to the novel PIIID treatment. The corrosion resistance of the NiTi alloys is improved greatly.

引用

页码：445 / 449

页数：5

共 15 条

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