基于铝热反应Cu-Fe二元合金的微观组织与摩擦性能研究EI北大核心CSCD

基于铝热法制备含2%(质量分数)Al的Cu-Fe合金,采用XRD,SEM,EDS和EBSD技术对Cu-Fe合金的相结构、微观组织进行表征,同时采用HVS-1000A维氏硬度仪和CFT-1材料表面性能测试仪测试Cu-Fe合金的硬度及抗磨损性能。结果表明:利用铝热反应可高效地制备Cu-Fe合金,成分可控,组织致密无夹杂,其中Fe相均匀地分布在Cu基体中,Cu和Fe的相界面结合良好;Fe相的硬度为322.2HV,基体Cu相的硬度为169.3HV,Cu-Fe合金的电导率为40.8 MS/m。铝热法制备的Cu-Fe合金具有较低的摩擦因数,平均摩擦因数为0.124,磨损率为2.17×10^(-3) mm 3·N^(-1)·m^(-1)。

Microstructure and friction properties of Cu-Fe binary alloys by thermite reaction

Cu-Fe alloy containing 2% (mass fraction) Al was prepared based on the thermite reaction. The phase structure and microstructure of the Cu-Fe alloy were characterized by XRD, SEM, EDS and EBSD techniques, and the hardness and wear resistance of Cu-Fe alloy were tested by using HVS-1000A Vickers hardness tester and CFT-1 material surface performance tester. The results show that the Cu-Fe alloy is efficiently prepared by the thermite reaction, with controllable composition and dense microstructure without inclusions. Fe phase is evenly distributed in the Cu matrix, the interface of Cu and Fe is well combined. The hardness of the Fe phase and the matrix Cu phase are 322.2HV and 169.3HV, respectively.The electric conductivity of Cu-Fe alloy is 40.8 MS/m. At the same time, the Cu-Fe alloy prepared by thermite reaction has lower friction coefficient and the average friction coefficient is 0.124, the wear rate is 2.17×10^-3 mm³·N^-1·m^-1.