TY - JOUR
T1 - Effects of thickness and cycle parameters on fretting wear behavior of CVD diamond coatings on steel substrates
AU - Wei, Qiuping
AU - Yu, Z. M.
AU - Ashfold, Michael N. R.
AU - Chen, Z.
AU - Wang, L.
AU - Ma, L.
PY - 2010/9/25
Y1 - 2010/9/25
N2 - Diamond films have been grown on carbon steel substrates by hot filament chemical vapour deposition (CVD) methods. A Co-containing tungsten-carbide coating prepared by high velocity oxy-fuel spraying was used as an intermediate layer on the steel substrates to minimize the early formation of graphite (and thus growth of low quality diamond films) and to enhance the diamond film adhesion. The effects of thickness and cycle parameters on adhesion, tribological behaviour and electrochemical treatment of the diamond film were investigated. The diamond films exhibit excellent adhesion under Rockwell indentation testing (1500 N load) and in high-speed, high-load, long-time reciprocating dry sliding ball-on-flat wear tests against a Si3N4 counterface in ambient air (500 rpm, 200 N, 300000 cycles). Time modulated CVD (wherein the CH4 fraction in the process gas mixture is cycled in time) is shown to yield diamond films offering an exceptional combination of low friction. high hardness, high wear resistance, as well as promising corrosion resistance. (C) 2010 Elsevier B.V. All rights reserved.
AB - Diamond films have been grown on carbon steel substrates by hot filament chemical vapour deposition (CVD) methods. A Co-containing tungsten-carbide coating prepared by high velocity oxy-fuel spraying was used as an intermediate layer on the steel substrates to minimize the early formation of graphite (and thus growth of low quality diamond films) and to enhance the diamond film adhesion. The effects of thickness and cycle parameters on adhesion, tribological behaviour and electrochemical treatment of the diamond film were investigated. The diamond films exhibit excellent adhesion under Rockwell indentation testing (1500 N load) and in high-speed, high-load, long-time reciprocating dry sliding ball-on-flat wear tests against a Si3N4 counterface in ambient air (500 rpm, 200 N, 300000 cycles). Time modulated CVD (wherein the CH4 fraction in the process gas mixture is cycled in time) is shown to yield diamond films offering an exceptional combination of low friction. high hardness, high wear resistance, as well as promising corrosion resistance. (C) 2010 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.surfcoat.2010.06.026
DO - 10.1016/j.surfcoat.2010.06.026
M3 - Article (Academic Journal)
SN - 0257-8972
VL - 205
SP - 158
EP - 167
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
IS - 1
ER -