与GH4169合金配副的C/C复合材料与高强石墨的滑动摩擦磨损性能

Sliding friction wear behaviors of C/C composites coupled with GH4169 alloy and high-strength graphite

在M-2000型摩擦磨损实验机上,以GH4169合金环为配副,对以粗糙层/光滑层/树脂炭(RL/SL/RC)为基体炭的C/C复合材料和拟用作航空发动机轴间密封环的高强石墨的滑动摩擦磨损性能进行对比研究。结果表明,随着时间延长,C/C复合材料的摩擦表面逐渐形成完整、致密的摩擦膜,因而摩擦因数逐渐降低,趋于平稳,在60～180 N载荷下,摩擦因数仅为0.11～0.18;而石墨材料摩擦因数在试验开始后迅速上升,达到动态平衡后保持小幅度的增长趋势,在60～180 N载荷下其摩擦因数为0.23～0.28。与高强石墨相比,C/C复合材料还具有更小的体积磨损,更适用于发动机轴间密封环材料。

Using a M-2000 wear machine,the tribology properties of C/C composite with rough lamination/smooth lamination/resin carbon（RL/SL/RC） matrix and two kinds of high-strength graphite which were used as seal ring of airplane engine main axis were studied with GH4169 alloy as couple.The results show that the friction coefficient of high-strength graphite was 0.23？0.28,while that of the C/C composite was only 0.11？0.18 under pressure of 60？180 N.It indicated that compared with the high-strength graphite,the C/C composite had lower and more stable friction coefficient,smaller bulk worn loss and more suitable to be used as the seal ring of the main axis of aeroplane engine.