Influence of boron doping on mechanical and tribological properties in multilayer CVD-diamond coating systems

被引：0
|
作者：
SAJAD HUSSAIN DIN
M A SHAH
N A SHEIKH
K A NAJAR
K RAMASUBRAMANIAN
S BALAJI
M S RAMACHANDRA RAO
机构：
[1] National Institute of Technology,Department of Mechanical Engineering
[2] National Institute of Technology,Department of Physics
[3] Indian Institute of Technology Madras,Nano Functional Materials Technology Centre, Department of Physics
来源：
Bulletin of Materials Science | 2016年 / 39卷
关键词：
Boron doping; multilayer CVD-diamond coatings; nano-indentation; Al; O; hardness; friction coefficient;
D O I：
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摘要：
Titanium alloy (Ti6Al4V) substrates were deposited with smooth multilayer coatings, by hot filament chemical vapour deposition technique. The effect of boron doping on lattice parameter, residual stresses, hardness and coefficient of friction in multilayer-diamond coating system was studied. The frictional behaviour of the coatings was studied using a ball-on-disc micro-tribometer by sliding the coated samples of titanium alloy (Ti6Al4V) substrates against alumina (Al2O3) balls, and increasing normal load from 1 to 10 N. The average friction coefficient decreased from 0.36 to 0.29 for undoped multilayer-diamond coating system and from 0.33 to 0.18 for boron- doped (BD) multilayer-diamond coating system. The average indentation depths for undoped and BD multilayer- diamond coating systems were found to be equal to ∼>58 and ∼65 nm, respectively, and their hardness values were 60 and 55 GPa, respectively.
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页码：1753 / 1761
页数：8
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