本文以纳米石墨薄片为润滑剂制备纳米减摩复合材料,比较其与传统以石墨微粉为润滑剂制备的减摩复合材料的减摩性能,利用SEM研究不同减摩复合材料的磨损和减摩机理,并定性和半定量地分析该纳米减摩复合材料的减摩机理.研究表明:在纳米石墨薄片加入量为3%-5%时制备的纳米减摩复合材料减摩性能优于20%石墨粉制备的传统减摩复合材料减摩性能或与其相当;分析低纳米石墨薄片添加量制备纳米减摩复合材料具有良好减摩性能的原因是,起润滑作用的多层"亚结构单元"在复合材料中所占体积分数与高石墨粉添加量制备减摩复合材料中多层"亚结构单元"所占体积分数相当,而磨损和减摩机理是前者除了具有与后者相同的磨损方式和减摩机理外,还存在"化学磨损"和"气润滑".
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