地面模拟微重力条件下Cu-Pb合金的制备及微观结构与摩擦性能研究

利用地面上建立的微重力电磁模拟设备成功制备出了Cu-Pb二元难混合金,并对其微观组织结构与摩擦性能进行了分析与测试.样品SEM分析结果表明,模拟微重力状态下制备的合金样品较好地克服了地面上因重力影响而产生的严重成分偏析,少数弥散相较均匀地分布于基体中,少数相含量越低,弥散体尺寸越小,分布越均匀;摩擦性能测试结果显示合金模拟样品的摩擦性能明显好于基体金属,且摩擦系数随少数相Pb的含量的增大而减小,体积磨损率随少数相含量的增大先快速减小而后又缓慢增大.同时对实验结果进行了简单的分析与讨论.

Preparation of Cu-Pb Alloy in Ground Simulating Microgravity Condition and Research of Microstructure and Friction Performance of the Alloy Samples

With electro-magnetic simulating equipment established on the ground Cu-Pb binary immiscible alloy are produced successfully,and microstructure and friction performance of the alloy samples are analyzed and tested.The analyzed results of microstructure show the alloy specimens produced on electro-magnetic simulating microgravity condition overcome severe phase separation due to gravity,the minority phase of simulating samples are well distributed in matrix,the lower con- tents of the minority phase is,the smaller size of dispersive phase is and the better it are distributed; test results of friction performance show friction performance of simulating samples is evidently bet- ter than the matrix metal,friction factor become small and wear properties rapidly reduce first and slowly increase later with increase of the minority phase contents.Simultaneously the test results are analyzed and discussed briefly.