碳基薄膜水润滑性能的研究进展

评述了碳基薄膜如类金刚石薄膜(DLC)和非晶氮化碳(a-CNx)薄膜水润滑的研究现状和进展。分析了第2元素加入和摩擦副材料对碳基薄膜在水中摩擦磨损特性的影响,探讨了碳基薄膜在水中的磨损机制。指出:氢化或氮化碳基薄膜的磨损率与摩擦副材料的水合反应有关,若摩擦副材料易于摩擦水合反应,碳基薄膜的磨损率很低;3种DLC薄膜在水中的磨损率与DLC的种类和对磨钢球材料无关,都在10-8mm3/(N.m)的数量级上变动;a-CNx/Si基非氧化物陶瓷摩擦副显示很低的摩擦因数和低的磨损率;在相同条件下,a-CNx薄膜比a-C薄膜更能显示优异的水润滑性能。

Progress in Water Lubrication of Carbon-based Coatings

The water lubrication characteristics of carbon-based coatings such as diamond-like carbon(DLC) and amorphous carbon nitride(a-CN_x) were reviewed.The influences of the second element and mating materials on the friction and wear property of carbon-based coatings were analyzed,and the wear mechanism of carbon-based coatings was investigated.It is indicated that the specific wear rate of the amorphous hydrogenated carbon or the amorphous carbon nitride coatings is related to the hydration reaction of mating materials with water.If the mating materials are easily hydrated,the specific wear rate of carbon-based coatings is lower.The specific wear rate of three kinds of DLC coatings in water varies at a low level of 10~(-8) mm~3/Nm,is independent of the type of DLC coatings and the mating steel balls.The a-CN_x/Si-based non-oxide ceramics tribo-pairs exhibit the lowest friction coefficient and wear rate.The water lubrication property of a-CN_x coatings is better than that of a-C coatings under the same experimental conditions.