CoCrFeNiAl增强Cu-10Sn复合材料的微观组织和摩擦性能

Microstructure and Friction Properties of CoCrFeNiAl Reinforced Cu-10Sn Composites

通过粉末冶金法制备了Cu-10Sn摩擦材料,探究了CoCrFeNiAl高熵合金含量对材料组织与摩擦磨损性能的影响。结果表明,不同含量CoCrFeNiAl颗粒可与Cu-10Sn基体颗粒稳定共存,并存在机械结合和冶金结合两种形式。不含CoCrFeNiAl材料的硬度最低,摩擦因数和磨损率均较大,磨损性能较差。随着CoCrFeNiAl含量增加,材料硬度显著提升,摩擦因数和磨损率先减小后增大;当CoCrFeNiAl含量为10%~20%时,材料磨损率持续下降,摩擦因数下降明显。当CoCrFeNiAl含量达到30%时,材料磨损率降到最低,此时摩擦因数又有所增大,同时具有最高的硬度,磨损性能达到最佳,这种变化主要归因于加入相颗粒与基体的协同作用。

The Cu-10 Sn friction material was fabricated by powder metallurgy,and the influence of CoCrFeNiAl content on the structure and friction and wear properties of the composites was explored.The results indicate that different contents CoCrFeNiAl particles different contents with can coexist stably with Cu-10 Sn matrix particles,which presents mechanical bonding and metallurgical bonding.The hardness of the material without CoCrFeNiAl is the minimum,and both the friction coefficient and wear rate are greater with poor wear performance.As the content of CoCrFeNiAl increases,the hardness of the composites is increased greatly,and the friction coefficient and wear rate are firstly decreased and then increased.When the content of CoCrFeNiAl is 10%to 20%,the wear rate continues to decrease,and the friction coefficient is decreased significantly.When CoCrFeNiAl content reaches 30%,the wear rate of the composites is decreased to the minimum,and the friction coefficient is raised again,where the composites exhibit the highest hardness and the optimal wear performance,which is mainly attributed to the synergy between the added phase particles and the matrix.