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将碳纳米管(CNTs)、铅粉按质量比1∶5混合后压块,采用钟罩将制备好的预制块压入轴承合金熔体制备CNTs/ZChPbSb15-5复合材料。研究了该复合材料的微观组织和显微硬度,并测试了该复合材料在一定载荷下的摩擦因数和磨损量。结果表明:碳纳米管能明显细化复合材料的组织,使SnSb相分布密度增大、且更加均匀;相比基体合金复合材料的显微硬度显著提高,尤其是合金质点相的硬度提高了31.0%;在相同条件下,该复合材料的摩擦因数和磨损量均低于基体合金。
The carbon nanotubes (CNTs) and lead powder were mixed at a weight ratio of 1: 5 and then the bellows were used to press the prepared preform into the bearing alloy melt to prepare the CNTs / ZChPbSb15-5 composite material. The microstructure and microhardness of the composites were studied, and the friction coefficient and wear amount of the composites under a certain load were tested. The results show that the carbon nanotubes can refine the microstructure of the composites remarkably and increase the distribution density of SnSb phases more uniformly. The microhardness of the composites increases significantly compared with that of the matrix alloy, especially 31.3% %. Under the same conditions, the friction coefficient and wear of the composites are lower than that of the matrix alloy.