High temperature tribological behavior of W containing diamond-like carbon (DLC) coating against titanium alloys

被引：127
作者：
Banerji, A. [1 ]
Bhowmick, S. [1 ]
Alpas, A. T. [1 ]
机构：
[1] Univ Windsor, Mech Automot & Mat Engn Dept, Windsor, ON N9B 3P4, Canada
来源：
SURFACE & COATINGS TECHNOLOGY | 2014年 / 241卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Titanium alloys; Diamond-like carbon; W-DLC coating; Polycrystalline diamond; Adhesion; Friction; RAMAN-SPECTROSCOPY; AMORPHOUS-CARBON; COATED DRILLS; LOW-FRICTION; ALUMINUM; FILMS; WEAR; LUBRICATION; TUNGSTEN; DEPOSITION;
D O I：
10.1016/j.surfcoat.2013.10.075
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The current study has been undertaken to determine friction, adhesion and wear mechanisms of tribological coatings for elevated temperature applications of Ti-6Al-4V alloy. Sliding wear characteristics of diamond-like carbon (DLC) coatings and polycrystalline diamond (PCD) was studied and compared with those of conventional N-based coatings, which exhibited a high coefficient of friction (COF) due to titanium adhesion to the coating surface. Hydrogenated DLC (H-DLC) and W containing DLC (W-DLC) coatings offered low and stable COF values of 0.11-012 at 25 degrees C while the PCD had the lowest COF of 0.05 at 25 degrees C. At temperatures >200 degrees C H-DLC's COF increased rapidly accompanied by high coating wear. At 100 degrees C W-DLC had a COF of 0.06 which increased to 0.46-0.54 between 200 degrees C and 300 degrees C similar to that of H-DLC. However, at 400 degrees C W-DLC's COF decreased to 0.07, and a low COF of 0.08 persisted at temperatures as high as 500 degrees C. The governing mechanisms of the low friction of W-DLC observed at elevated temperatures were revealed by studying the compositions of the coating surfaces and the transfer layers formed on Ti-6Al-4V. Raman spectroscopy indicated that at 25 degrees C the transfer layers were rich in carbon, whereas at 500 degrees C they consisted mainly of tungsten trioxide (WO3) that formed on W-DLC's surface. (C) 2013 Elsevier B.V. All rights reserved.
引用
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页码：93 / 104
页数：12
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