点击次数：

论文类型：期刊论文

发表时间：2010-05-01

发表刊物：22nd International Conference on Surface Modification Technologies

收录刊物：SCIE、EI、CPCI-S

卷号：26

期号：4

页面范围：277-283

ISSN号：0267-0844

关键字：Austenitic stainless steel; Tribological properties; Plasma based low energy ion implantation; High nitrogen face centred cubic phase; Wear mechanism

摘要：Tribological properties of a single high nitrogen face centred cubic phase gamma(N) layer formed on the plasma based low energy nitrogen ion implanted AISI 316 austenitic stainless steel were investigated on a ball on disc tribometer against the same stainless steel counterface under a normal load of 2 N with a sliding speed from 0.16 to 0.39 m s(-1). The microhardness of the gamma(N) phase layer with a thickness of similar to 13 mu m and a nitrogen peak concentration of similar to 35 at-% was measured to be similar to 22 GPa. During the sliding for 1 h, the faint wear tracks of the gamma(N) phase layer against the same stainless steel ball were observed with all the sliding speeds. The friction coefficient of the gamma(N) phase layer changed in the range from 0.85 to 0.70 with increasing sliding speed. Formation of the gamma(N) phase layer on the stainless steel significantly improved the wear resistance of the stainless steel against the same stainless steel. An oxidative wear mechanism of the gamma(N) phase was found instead of an adhesive wear mechanism of the original stainless steel because the gamma(N) phase was prone to tribochemical oxidation on the worn surface due to the nitrogen supersaturation in austenite matrix.