Effect of CVD-Diamond on the Tribological and Mechanical Performance of Titanium Alloy (Ti6Al4V)
Journal Title: Tribology in Industry - Year 2016, Vol 38, Issue 4
Abstract
Nano-crystalline diamond and microcrystalline diamond films have been separately deposited on chemically treated titanium alloy (Ti6Al4V) substrates from methane/hydrogen (CH4/H2) gas mixture, using hot filament chemical vapor deposition technique. The coatings have architecture of Ti6Al4V/NCD and Ti6Al4V/MCD. The as grown nano-crystalline diamond and microcrystalline diamond films were characterized using high resolution scanning electron microscope and Raman's spectroscopy. The residual stresses along the surface of nano-crystalline diamond coatings and micro-crystalline diamond coatings are compressive in nature as shown by the Raman spectroscopy. Nanoindentation tests were also conducted using Berkovich nanoindenter for the purpose of measurement of hardness and elastic modulus values. The indentation depth for microcrystalline diamond coating was 65 nm, whereas for nanocrystalline diamond coating, it was 72 nm. Microcrystalline diamond and nanocrystalline diamond coatings have yielded the super-hardness of ~55 G Pa and ~38 G Pa respectively. The average coefficient of friction of microcrystalline diamond and nanocrystalline diamond coatings decrease from 0.305-0.27 to 0.068-0.053, respectively, when the load is increased from 1 N to 10 N. However, for conventional Ti6Al4V substrate the average coefficient of friction changes from 0.625 to 0.38 under the same input conditions.
Authors and Affiliations
S. H. Din, M. A. Shah, N. A. Sheikh
Keywords
Related Articles
- EP ID EP228385
- DOI -
- Views 119
- Downloads 0
Wear Properties of A356/10SiC/1Gr Hybrid Composites in Lubricated Sliding Conditions
This paper presents basic tribological properties of A356/10SiC/1Gr hybrid composites in conditions with lubrication. Hybrid composite specimen is obtained by compocasting procedure. A356 aluminium alloy is used as a bas...
Neural Network Modeling of Cutting Fluid Impact on Energy Consumption during Turning
This paper presents a part of research on power consumption differences between various cutting fluids used during turning operations. An attempt was made to study the possibility of artificial neural network to model th...
Eco-friendly Multifunction Petroleum Additives: Preparation, Characterization and Evaluation
ZDDP (zinc dialkyldithiophosphate) is one of the most commonly used petroleum additives as anti-wear, anti-rust and anti-oxidant but it has some environmental problems, so there is a must to find alternative eco-friendly...
Experimental Investigations on Tribological Behaviour of Alumina Added Acrylonitrile Butadiene Styrene (ABS) Composites
Composite materials are multifunctional in nature, which can be custom-made based on the nature of the applications. The challenge of composite materials lie on complementing the properties of one another i.e. materials...
Effects of Viscosity Variation and Surface Roughness on the Couple stress Squeeze Film Characteristics of Short Journal Bearings
The theoretical analysis of the combined effects of surface roughness and viscosity variation on the couple stress squeeze film characteristics of short journal bearings is presented. The modified stochastic Reynold’s eq...