Improvement of Tribological Behaviour of Biomedical Nanocrystalline Titanium by Magnetron Sputtered DLC/SiC Double Layer Films
The nano-indentation response, the film-substrate adhesion behaviors and the friction and wear properties of the DLC/SiC (diamond-like carbon/silicon carbon) double layer thin films (SiC films as interlayer) deposited on nanocrystalline titanium substrate using magnetron sputtering technique at room temperature were investigated. The results show that the DLC films exhibited a low nano-hardness (7.4 GPa) and Youngs modulus (62.2 GPa) but a high hardness-to-modulus ratio (0.119). The films-substrate system displayed a good interface adhesion and a good friction/wear properties with the friction coefficient of about 0.1, the special wear rate in the magnitude order of 10.6 mm3 m.1 N.1 together with little film cracking and interface delaminating even at considerably high contact load, when sliding against Si3N4 (silicon nitride) ball using ball-on-disc wear tester under Kokubo simulation body fluid (SBF) at room temperature. The high wear-resistance is in accordance with the high ductility of the films, the good modulus match in the films-substrate system, and the high hardness-to-modulus ratio of the films. The nano-indentation response, the film-substrate adhesion behaviors and the tribological properties are in accordance and can be ascribed to the high activity of the nanocrystalline Ti substrate.
Substrate Nanocrystallizatin Thin Films Nano-indentation Friction and Wear Magnetron Sputtering
X.J. XU H. WANG X.N. CHENG
Institute of Advanced Forming Technology, Jiangsu University, Zhenjiang 212013, China
国际会议
重庆
英文
1026-1033
2008-06-09（万方平台首次上网日期，不代表论文的发表时间）