润滑油
材料科学
石墨
复合材料
石墨烯
干润滑剂
结晶度
润滑
超高分子量聚乙烯
氧化石墨
聚乙烯
氧化物
结晶
聚氧化乙烯
打滑(空气动力学)
摩擦系数
聚合物
化学工程
冶金
纳米技术
物理
工程类
热力学
作者
Julian Somberg,Gil Gonçalves,Nazanin Emami
标识
DOI:10.1016/j.triboint.2023.108643
摘要
Graphene oxide (GO), chemically expanded graphite (CEG) and graphite were evaluated as solid lubricant for ultrahigh molecular weight polyethylene composites. Under dry conditions, the addition of all solid lubricants increased the coefficient of friction by up to 38%. For the composites corrugated stick–slip features were observed which correlate with a decrease in matrix degree of crystallinity. GO had the lowest effect on the crystallisation, resulting in the lowest relative increase in friction coefficient of only 13%. Under water lubrication, GO, CEG and graphite were equally effective in reducing friction and wear. The highest friction for the neat matrix was found to be due to a transfer film, which was suppressed by the addition of the solid lubricants.
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