A series of experiment were performed to test the tribological properties of Si3N4 ceramic pair lubricated by emulsions of alcohol, acid and alkane. The experimental results show that the function group can' t improve ceramic lubrication, which is reverse to metals. Under the condition of same carbon-chain, the lubrication by alcohol and acid are worse than alkane. With the friction curve and wear scar diameter analysis, it can be found that the carrying capacity of reaction product is lower,which makes it easy to wear-out in the experiments. When Si3N4 lubricated by emulsion, the hydrophilicity raise is disadvantage to lubrication on a large scale.%通过一系列摩擦试验考察两组不同碳链长度的酸、醇和烷烃的乳化液对氮化硅陶瓷摩擦副的润滑效果.试验结果表明:与传统金属的润滑效果相反,极性官能团的引入并不能提高试剂的润滑效果;相同碳链长度条件下,酸和醇的润滑效果都比对应烷烃要差.依据摩擦曲线形态特征以及磨斑直径的相对关系,可以发现醇在氮化硅陶瓷表面摩擦时所产生化学反应膜的承载能力较弱并较易在摩擦过程中去除.试验所用的几种水乳体系中,试剂亲水性的提高对润滑效果的提高是不利的.
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