点击次数：

论文类型：期刊论文

发表时间：2011-06-25

发表刊物：SURFACE & COATINGS TECHNOLOGY

收录刊物：SCIE、EI

卷号：205

期号：19

页面范围：4602-4607

ISSN号：0257-8972

关键字：Plasma-based low-energy ion implantation; Plasma source ion nitriding; Titanium; Wear; Corrosion

摘要：Plasma-based low-energy nitrogen ion implantation, including plasma source ion nitriding/carburizing and plasma source low-energy ion enhanced deposition, has emerged as a low-temperature surface engineering technique for metal and alloy. In this paper, the pure metal Ti samples have been modified by the plasma source ion nitriding process at a process temperature of 700 degrees C for a processing time of 4 h. The nitrided Ti surfaces were constructed of a continuous and dense Ti(2)N compound layer about 2 mu m thick and a 7-8 mu m diffused layer. During tribological test on a ball on disk tribometer against the Si(3)N(4) ceramic counterface, a low friction coefficient of about 0.3 and the faint wear volume were obtained for the nitrided Ti samples. The cyclic polarization curves of the nitrided Ti samples in 3.5% and 6.0% NaCl solutions showed that the improved pitting corrosion resistance with an increase of corrosion potential and a decrease of passive current, compared with that of the unnitrided Ti sample. The plasma source ion nitriding of the Ti samples provided the engineering surfaces for the functional applications with the combined improvement in wear and corrosion resistance. (C) 2011 Elsevier B.V. All rights reserved.