High-Temperature Tribological Performance of TiAl Matrix Composites Reinforced by Multilayer Graphene
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- 作者：Zengshi Xu ; Qiaoxin Zhang ; Peixing Jing ; Wenzheng Zhai
- 关键词：Self ; lubricating composites ; Solid lubricant additives ; Solid lubrication mechanisms ; Self ; lubricated wear
- 刊名：Tribology Letters
- 出版年：2015
- 出版时间：April 2015
- 年：2015
- 卷：58
- 期：1
- 全文大小：2,408 KB
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文摘
In order to acquire deep insights into understanding the lubricative properties of multilayer graphene (MLG) for MLG-reinforced TiAl matrix composites (GTMC), the high-temperature tribological performance of GTMC is investigated for the first time from 100 to 700?°C using a rotating ball-on-disk configuration. Tribological results indicate the evolution of lubricative properties of MLG with testing temperature. In the testing temperature range from 100 to 550?°C, MLG presents the excellent lubricative properties due to its low shear and highly protective nature. Between 550 and 600?°C, the transition of lubricative properties of MLG occurs. Above 600?°C, MLG loses the lubricative properties due to its oxidation but improves the oxidation resistance of GTMC by sealing the grain boundaries and inhibiting the influx of oxygen through grain boundaries.