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采用无压熔渗工艺制备一种新型的具有自润滑耐磨性能的炭纤维整体织物/炭-铜(C/C-Cu)复合材料,在改装的MM-2000型环-块摩擦磨损试验机上考察其载流摩擦磨损性能,探讨外加直流电对摩擦磨损行为的影响并分析其作用机理.结果表明:电流方向决定了复合材料摩擦面磨屑层存在与否,对摩擦系数有较大影响.正接条件下复合材料的摩擦系数和磨损率高于负接条件下.电流强度对C/C-Cu复合材料磨损率影响较为显著.随电流强度增大,磨损率增大,磨损机制由犁削磨损向黏着磨损转变.摩擦系数随电流强度的增大先升高后降低.
A new type of carbon fiber monolith / carbon-copper (C / C-Cu) composite with self-lubricating and wear-resistant properties was prepared by pressureless infiltration process. The modified MM-2000 ring-block friction and wear tester The effect of DC current on the friction and wear behavior was investigated and the mechanism was analyzed. The results show that the current direction determines the presence or absence of wear debris layer on the friction surface of the composite material, which has a great influence on the friction coefficient. The friction coefficient and wear rate of the composites were higher than that of the negative connection.The current strength had a significant effect on the wear rate of C / C-Cu composites.The wear rate increased with the increase of current intensity, Change to the adhesive wear.Friction coefficient first increases and then decreases with the increase of current intensity.