Effects of graphite contents on the microstructure evolution, mechanical properties and high temperature tribological behavior of Cu-Ni-Al/Gr solid-lubricating composites
Effects of graphite contents on the microstructure evolution, mechanical properties and high temperature tribological behavior of Cu-Ni-Al/Gr solid-lubricating composites
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DOI：
10.1016/j.triboint.2022.108193
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发表时间：
2022-12-30
影响因子：
6.2
通讯作者：
Yang, Jun
中科院分区：
文献类型：
--
作者：
Chen, Zhiming;Fan, Hengzhong;Yang, Jun
高温铜基自润滑复合材料对于工业应用至关重要。本文制备了石墨含量为2.5-10%的Cu-Ni-Al/Gr固体润滑复合材料。深入研究了石墨含量对室温至500℃摩擦学行为的影响。结果表明，石墨的添加显着改善了摩擦学性能，但当石墨含量达到7.5-10 wt%时，摩擦学性能不再进一步提高，摩擦系数为0.04-0.22，磨损率为(1.02-10.12)x 10-5 mm3/Nm。 25-500℃下优异的摩擦学性能归因于石墨润滑剂提供的自润滑性能和滑动过程中形成的摩擦氧化层的协同效应。
High temperature copper matrix self-lubricating composites are essential for industrial applications. This paper fabricated the Cu-Ni-Al/Gr solid-lubricating composites with 2.5-10 wt% graphite. Effects of graphite contents on the tribological behavior at room temperature to 500 degrees C were thoroughly studied. The conclusions present that the addition of graphite significantly improves tribological properties while no further enhancement can be made when graphite reaches 7.5-10 wt%, which shows the friction coefficient of 0.04-0.22 and wear rate of (1.02-10.12)x 10-5 mm3/Nm. The excellent tribological performance at 25-500 degrees C is attributed to the syner-gistic effects of the self-lubricating property provided by graphite lubricant and the tribo-oxide layer formed during the sliding process.