Friction and Wear Properties of Magnetron Sputtered DLC/SiC Films on Magnesium Alloy
The nano-indentation response and the friction/wear properties of DLC/SiC (diamond-like carbon/silicon carbon) double layer thin films deposited on Mg alloy (AZ91D) substrate using magnetron sputtering technique at room temperature were investigated. The results show that the DLC films displayed low nano-hardness (3.05 GPa), low Youngs modulus (24.67 GPa) but high hardness-to-modulus ratio (0.124). The films-substrate system exhibited a good friction and wear properties with the mean friction coefficient of about 0.175, the special wear rate in the magnitude order of 10.6 mm3 m.1 N.1 together with little film-cracking and interface-delaminating, when sliding against Si3N4 (silicon nitride) ball using ball-on-disc wear tester under dry frictional condition. The high wear-resistance is in accordance with high ductility of the films, good modulus match in the films-substrate system, and high hardness-to-modulus ratio of the films. The underlying factors are discussed and are believed to be due to the substrate is Mg, a metal with high activity.
Mg alloy Substrate Thin Films Nano-indentation Friction and Wear Magnetron Sputtering Deposition
X.J. XU D.F. XIA
Institute of Advanced Forming Technology, Jiangsu University, Zhenjiang 212013, China
国际会议
重庆
英文
853-858
2008-06-09（万方平台首次上网日期，不代表论文的发表时间）