Achieving High Tribological Performance of Graphite-like Carbon Coatings on Ti6Al4V in Aqueous Environments by Gradient Interface Design

被引：42
作者：
Guan, Xiaoyan [1 ,2 ]
Lu, Zhibin [1 ]
Wang, Liping [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
来源：
TRIBOLOGY LETTERS | 2011年 / 44卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Ti6Al4V alloy; Duplex treatment; Nitrogen ion implantation; Gradient interfaces; DIAMOND-LIKE CARBON; AMORPHOUS-CARBON; SURFACE-ROUGHNESS; MULTILAYER COATINGS; ION-IMPLANTATION; TITANIUM-ALLOYS; WEAR BEHAVIOR; DLC COATINGS; FILMS; STEEL;
D O I：
10.1007/s11249-011-9851-1
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A duplex treatment involving nitrogen ion preimplantation and gradient interfacial transition was performed to obtain a high-performance graphite-like carbon (GLC) coating on a Ti6Al4V alloy. Characteristics of the as-deposited coating systems were systemically investigated by Raman spectrometry, scanning electron microscopy, atomic force microscopy, nano-indentation, and scratch tests. The friction and wear behaviors in distilled water and sea water environments were evaluated by a ball-on-disk tribometer. The results showed that the GLC multilayer coating on nitrogen ion-implanted Ti6Al4V possessed a greater hardness and adhesion strength than to that on un-implanted Ti6Al4V. The tribological performances of these duplex process systems showed a great improvement in both the distilled water and sea water environments. In particular, the Cr/CrN/GLC coatings on nitrogen ion-implanted substrates demonstrated the best friction and wear behaviors. These striking improvements were attributed to the greatly enhanced interface strength between substrate and coating by the nitrogen ion implantation process and improved adhesion strength between gradient layers by the appropriate gradient interlayers with a similar thermal expansion coefficient.
引用
收藏
页码：315 / 325
页数：11
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