Mo2BC增强Al基复合材料摩擦学性能研究  

Study on the Tribological Properties of Mo 2BC Reinforced Al Matrix Composite Materials

作　　者：祝林 王帅[1] 游龙[2] 刘娟[1,2] 逄显娟 陆焕焕[1] 宋晨飞 张永振[1] ZHU Lin;WANG Shuai;YOU Long;LIU Juan;PANG Xianjuan;LU Huanhuan;SONG Chenfei;ZHANG Yongzhen(National United Engineering Laboratory for Bearing Tribology,Henan University of Science and Technology,Luoyang 471023,Henan,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,Henan,China)

机构地区：[1]河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室,河南洛阳471023 [2]河南科技大学材料科学与工程学院,河南洛阳471023

出　　处：《材料导报》2025年第9期158-163,共6页Materials Reports

基　　金：国家自然科学基金(92266205);河南省自然科学基金(242300421182);河南省科技攻关项目(252102231034)。

摘　　要：采用真空热压烧结制备了不同Mo_(2)BC含量的Al基复合材料,并进一步分析了Mo_(2)BC含量对Al基复合材料摩擦学性能的影响。研究表明:随着Al基体中Mo_(2)BC陶瓷颗粒含量的增加,材料体系的硬度得到了明显的提升,这是因为高硬度的Mo_(2)BC陶瓷颗粒在复合材料中能够表现出显著的钉扎效应,使得基体在受力过程中产生的塑性变形能够得到抑制。当Mo_(2)BC陶瓷颗粒的质量分数提高到30%时,复合材料的硬度较纯Al提升了约130%,其硬度值高达72.5HV_(0.2)。此外,随着Mo_(2)BC陶瓷颗粒含量的增加,复合材料的摩擦磨损性能得到了明显的改善。对于纯Al和添加Mo_(2)BC质量分数为10%的Al基复合材料,当其与GCr15轴承钢进行配副时,磨损机制主要表现为二体磨粒磨损和黏着磨损,此时材料基体具有较高的磨损率(1.43×10^(-4)mm^(3)·N^(-1)·m^(-1))和摩擦系数(0.84)。随着添加的Mo_(2)BC陶瓷颗粒质量分数逐渐增加至30%,复合材料的磨损率降低至2.35×10^(-3)mm^(3)·N^(-1)·m^(-1),摩擦系数降至0.56,表现出一定的减摩润滑特性。这是由于Mo_(2)BC的添加能够使材料体系摩擦表面通过摩擦氧化作用生成具有润滑性能的摩擦氧化物层,有效抑制了二体磨粒磨损和黏着磨损,起到了一定的抗磨减摩效应。Aluminum matrix composites reinforced with different content of Mo_(2)BC ceramic were prepared using vacuum hot pressing sintering method,and analysis was conducted on the influence of Mo_(2)BC content on the tribological properties of aluminum matrix composites.It is confirmed that with the increment of the Mo_(2)BC content,the hardness of the composite is significantly improved.This can be ascribed to the significant pinning effect of Mo_(2)BC ceramic particles in the composite materials matrix,which can inhibit the plastic deformation of the matrix during the sliding process.When the mass fraction of Mo_(2)BC ceramic particles increases up to 30%,the hardness of the composite increases by 130%compared with plain Al,where the hardness is as high as 72.5HV_(0.2).In addition,with the increasing content of Mo_(2)BC ceramic particles,the friction and wear properties of the composites have been significantly improved.For plain Al and Al matrix composites containing 10%Mo_(2)BC,when coupled with GCr15 bearing steel,the two materials exhibit high friction coefficient(0.84)and wear rate(14.3×10^(-3)mm^(3)·N^(-1)·m^(-1)).As the Mo_(2)BC ceramic particles gradually increase up to 30%,the material can exhibit lubrication effect,in which the wear rate and friction coefficient of the composite come down to 2.35×10^(-3)mm^(3)·N^(-1)·m^(-1)and 0.56,respectively.This is because the addition of Mo_(2)BC ceramic particles can generate lubricating tribo-oxides on the wear surface of the Al matrix composite due to the tribo-oxidation reaction,which can effectively inhibit the two body abrasive and adhesive wear,and it has a certain anti-wear and anti-friction effect.

关 键 词：铝基复合材料 粉末冶金 摩擦学行为 磨损机制 

分 类 号：TH117.1[机械工程—机械设计及理论]