Mechanical and tribological properties of TiC/amorphous hydrogenated carbon composite coatings fabricated by DC magnetron sputtering with and without sample bias

Hu, Yawei; Li, Liuhe; Cai, Xun; Chen, Qiulong; Chu, Paul K. (2007). Mechanical and tribological properties of TiC/amorphous hydrogenated carbon composite coatings fabricated by DC magnetron sputtering with and without sample bias Diamond related Materials, 16(1), pp. 181-186. Elsevier 10.1016/j.diamond.2006.05.010

Text Mechanical and tribological properties of TIC.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (932kB) | Request a copy

TiC/amorphous hydrogenated carbon (a-C:H) composite films were deposited by Ti DC magnetron sputtering using argon and acetylene as the carrier gas and precursor, respectively. The working pressure was maintained at 4 × 10− 1 Pa and the composition of the films was modulated by controlling the partial pressure of acetylene. The composition and structure of the films were evaluated by X-ray photoelectron spectroscopy and glancing angle X-rays diffraction, whereas the hardness and elastic modulus values of the films fabricated using different sample biases were measured by nano-indentation. Ball-on-disk tribometry was used to measure the tribological properties, and secondary electron microscopy was used to analyze the wear tracks. The results show that the friction coefficients and wear rates do not vary significantly with the Ti concentrations when the Ti concentration is above 39.7 at.% or below 20 at.% but increase with increasing titanium concentrations between 20 at.% and 39.7 at.%. The wear mechanism depends on the relative amounts of TiC and a-C:H. At high Ti concentrations, the mechanism resembles that of TiC due to the thin a-C:H matrix surrounding the TiC grains. At low Ti concentrations, the mechanism is similar to that of DLC as the effects of the a-C:H matrix dominates over those of the TiC grains.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Engineering and Computer Science > Institute for Surface Applied Laser, Phototonics and Surface Technologies ALPS School of Engineering and Computer Science
Name:	Hu, Yawei; Li, Liuhe; Cai, Xun; Chen, Qiulong and Chu, Paul K.
ISSN:	0925-9635
Publisher:	Elsevier
Language:	English
Submitter:	Patrick Schwaller
Date Deposited:	10 Dec 2019 09:09
Last Modified:	10 Dec 2019 09:09
Publisher DOI:	10.1016/j.diamond.2006.05.010
ARBOR DOI:	10.24451/arbor.9276
URI:	https://arbor.bfh.ch/id/eprint/9276