Influence of C content on microstructure, mechanical properties and friction and wear properties of TiWCN composite films

被引：0
|
作者：
Yu, Lihua [1 ]
Dong, Hongzhi [1 ]
Xu, Junhua [1 ]
机构：
[1] Institute of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang
来源：
Jinshu Xuebao/Acta Metallurgica Sinica | 2014年 / 50卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Friction and wear property; Magnetron sputtering; Mechanical property; Microstructure; TiWCN composite film;
D O I：
10.11900/0412.1961.2014.00183
中图分类号：
学科分类号：
摘要：
Over the past decades, traditional hard transition metal nitride films, such as TiN, have been widely used as machining and metal-forming tools coating materials due to their high hardness and chemical stability. With the rapid development of modern industrial technology, TiN has been unable to meet the requirements of modern industry, nanocomposite films because of its excellent comprehensive performance have attracted more and more scholars' attention. TiWN film as one of the TiN-based films has become a better substitute material. However the room temperature tribological property of TiWN film is not ideal, which limits its use of performance. According to the published experimental studies, C can well improve the room temperature tribological property because of its self-lubricating performance. However the effects of C content on the hardness of TiWN film is still not clear. The effects of C on mechanical property and the friction and wear property of TiWN film remain to be investigated. A series of TiWCN composite films with various C contents have been synthesized by magnetron sputtering technique. The microstructures, mechanical properties and the friction and wear property were investigated by XRD, SEM, nano-indentation, high temperature ball-on-disc tribo-meter, respectively. The results show that Ti-WCN composite films consist of fcc structure TiWCN phase and hcp structure Ti2N phase. With the increase of C content, the hardness of TiWCN films increases first and then decreases, the wear rate decreases first and then increases, while the friction coefficient gradually decreases. The maximum hardness of 35.97 GPa and the minimum wear rate value of 1.26×10-5 mm3· N-1· m-1 are obtained when C content is 11.25%. The minimum friction coefficient of 0.32 is obtained when C content is 13.68%. The friction coefficient and wear rate of TiWCN composite films are lower than that of TiWN films when the temperature is below 370℃; while the values are higher than that of TiWN films when the temperature exceeds 370℃. C added to the TiWN films improves mechanical properties and the room temperature friction and wear properties of the films though does not enhance the high temperature friction and wear properties of the films. © Copyright.
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页码：1350 / 1356
页数：6
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