Tribological behaviour of C-alloyed transition metal dichalcogenides (TMD) coatings in different environments

被引：19

作者：

Evaristo M. ^{[1
]}

Polcar T. ^{[1
,2
]}

Cavaleiro A. ^{[1
]}

机构：

[1] ICEMS, Departamento Engenharia Mecânica, Universidade de Coimbra, Coimbra, 3030-078, Rua Luís Reis Santos

[2] Faculty of Transportation Sciences, Department of Applied Mathematics, CTU in Prague, Prague 1

来源：

International Journal of Mechanics and Materials in Design | 2008年 / 4卷 / 2期

关键词：

C-TMD; Low friction; Self-lubricant; Wear behaviour; WS[!sub]2[!/sub;

D O I：

10.1007/s10999-007-9034-2

中图分类号：

学科分类号：

摘要：

W-S-C films were deposited by non-reactive sputtering from a carbon target incrusted with WS2 pellets in the eroded zone. This process allows depositing coatings with a wide range of compositions, with a precise control of their carbon content. Before the deposition, a Ti interlayer was interposed between the film and the substrate to improve the final adhesion. The carbon content in W-S-C system was varied from 29 at.% to 70 at.%, which led to an hardness enhancement from 4 GPa up to 10 GPa where the maximum hardness was reached in films with a carbon content between 40 at.% and 50 at.%. The tribological behaviour of the coatings was evaluated by pin-on-disk testing, in environments with different humidity levels. Generally, the tribological performance of W-S-C coatings in environments with moderate to high humidity is better for coatings with high carbon content. Friction coefficients, as 0.05 or lower could be reached at low humidity ranges (<7%) to all compositions. However, for higher humidity values, friction coefficient increased up to 0.30 in the W-S-C film with low carbon content whereas it was kept approximately constant for the others compositions. © 2007 Springer Science+Business Media B.V.

引用

页码：137 / 143

页数：6

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