摘要
用点接触显微镜在纳米尺度上研究了碳化硼材料的磨损特性,考察了未经预氯化和经1073K预氧化处理1 h的2种热压碳化硼试样磨损深度随载荷、磨损次数、扫描速度等的变化情况。研究结果表明,未经预氧化的碳化硼试样,磨损深度很小,而经过预氧化处理的碳化硼试样,磨损深度远远大于未经氧化的试样。两者的磨损深度均随载荷的增加而显著增加。未经氧化的碳化硼试样由于其纵向上的结构是均匀的,磨损深度随磨损次数的增加呈线性增加;经氧化处理的碳化硼试样的磨损深度随磨损次数的增加呈现2段线性关系,可推断其表层的H_3BO_3膜厚度约为120～140nm。2种试样的磨损深度与扫描速度均无明显关系。
The wear characteristics of boron carbide without oxidization and with oxidization 1 h at 1073 K are investigated with point contact microscope (PCM). The results show that boron carbide without oxidization possessed excellent wear resistant capability, while wear depth of oxidized sample is deeper than that of without oxidization one. For both samples, with and without oxidization, wear depth increases remarkably as the normal load increase, but scan speed has no notable effect on wear depth. That wear depth of without oxidization sample increased linearly with scan cycles infer that the material is uniform longitudinally. The relation between the wear depth and scan cycles on oxidized boron carbide sample inferred that the thickness of H_3BO_3 surface film is about 120～140 nm.
出处
《粉末冶金材料科学与工程》
EI
2002年第3期165-169,共5页
Materials Science and Engineering of Powder Metallurgy
基金
国家"九五"科技攻关项目
关键词
碳化硼
纳米摩擦
磨损深度
预氧化
boron carbide
nano friction
wear depth
pre-oxidization
