PEO陶瓷层对铝基体上DLC薄膜承载特性的影响

重载作用下,类金刚石(DLC)薄膜直接应用于铝合金等软金属基体上易发生脆性破裂和剥离而导致过早失效.针对这一问题,以PEO陶瓷层作为承载层,采用有限元数值计算方法,对复合涂层在均布接触载荷作用下的应力场进行研究.结果表明:陶瓷层可明显降低DLC膜的表面拉应力和界面剪应力,起到了良好的载荷支撑作用;陶瓷层厚度对涂层表面拉应力,界面及基体内剪应力的分布有显著影响,其中陶瓷层厚度与接触半宽比为0.150.30时,涂层可以获得较为合理的表面和界面应力场,从而改善DLC膜在铝合金基体上的摩擦磨损性能

Micro/Nanomechanical and Tribological Properties of thin Diamond-Like Carbon Coatings

The diamond-like carbon (DLC) films with different thicknesses on 9Crl8 bearing steels were prepared using vacuum magnetic-filtering arc plasma deposition. Vickers indentation. nanoin-dentation and nanoscratch tests were used to characterize the DLC films with a wide range of applied loads. Mechanical and tribological behaviors of these submicron films were investigated and interpreted. The hardnesses of 9Crl8 and DLC, determined by nanoindentation, are approximately 8GPa and 60GPa respectively; their elastic moduli are approximately 25OGPa and 600GPa respectively. The friction coefficients of 9Crl8, DLC. organic coating, determined by nanoscratch, are approximately 0. 35, 0. 20 and 0. 13 respectively. It is demonstrated that nanoindentation and nanoscratch tests can provide more information about the near-surface elastic-plastic deformation, friction and wear properties. The correlation of mechanical properties and scratch resistance of DLC films on 9Crl8 steels can provide an assessment for the load-carrying capacity and wear resistance

用PECVD在低温衬底上制备类金刚石碳膜(英文)

报道用RF PECVD在低温衬底上制备了类金刚石碳(DLC)膜。研究了氢稀释、气体压力和RF功率对薄膜性质的影响。用光透射率、红外吸收谱和小角度X射线衍射谱分析了DLC膜的结构和光学性质。