DLC-W coatings tested in combustion engine - Frictional and wear analysis

被引：32
|
作者：
Mutafov, P. [1 ]
Lanigan, J. [2 ]
Neville, A. [2 ]
Cavaleiro, A. [3 ]
Polcar, T. [4 ]
机构：
[1] Czech Tech Univ, Fac Elect Engn, Dept Control Engn, CR-16635 Prague 6, Czech Republic
[2] Univ Leeds, Sch Mech Engn, iETSI, Leeds LS2 9JT, W Yorkshire, England
[3] Univ Coimbra, Dept Mech Engn, SEG CEMUC, P-3030788 Coimbra, Portugal
[4] Univ Southampton, nCATS, Southampton SO17 1BJ, Hants, England
来源：
SURFACE & COATINGS TECHNOLOGY | 2014年 / 260卷
基金：
英国工程与自然科学研究理事会;
关键词：
DLC coatings; Tribology; Raman spectroscopy; Internal combustion engine; OIL ADDITIVES; PERFORMANCE; ZNDTP;
D O I：
10.1016/j.surfcoat.2014.06.072
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Hydrogenated diamond-like carbon coatings doped with tungsten were deposited by reactive magnetron sputtering from graphite and composite graphite/tungsten target in an Ar/methane atmosphere. Polished steel samples for laboratory testing and commercial valve tappets were used as substrates. The microstructure of the coating was studied by transmission electron microscopy (TEM), Raman spectroscopy, and electron energy loss spectroscopy, adhesion by scratchtest method and mechanical properties by depth sensing nanoindentation. Coatings were tribologically tested in lubricated contact in laboratory (pin-on-disc) and field (engine) conditions. The worn surfaces were analysed by Raman and time-of-flight secondary ion mass spectroscopies and observed by TEM. The coatings showed excellent wear resistance with negligible wear; the worn surface was covered by a very thin solid tribolayer formed from oil additives. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：284 / 289
页数：6
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