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 ,考察了热压碳化硼及经 10 73K预氧化处理 1h的两种试样的磨损深度随载荷、磨损次数、扫描速度等的变化关系。结果表明 :未经预氧化的碳化硼试样的磨损深度很小 ,而经过预氧化处理的碳化硼试样的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在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两段线性关系 ,可推断表层的H3 BO3 膜厚度为 12 0～ 14 0nm ;
The wear characteristics of boron carbide without and wit h pre-oxidation at 1 073 K for 1 h were investigated with point contact micros cope (PCM). The results show that boron carbide without pre-oxidation possesses excellent wear resistant capability. On the contrary, the wear depth of oxidize d sample is much more deeper than that of without pre-oxidation one. For both s amples, with and without pre-oxidation, the wear depth increases remarkably as the normal load rises, and the scanning speed has no notable effect on wear dept h. The wear depth of the sample without oxidation increases linearly with scanni ng cycles, inferring that the sample is uniform longitudinally. The relation bet ween the wear depth and scanning cycles on oxidized sample infers that the thic kness of H 3BO 3 surface film is about 120-140 nm.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2003年第1期132-135,共4页
The Chinese Journal of Nonferrous Metals
基金
国家"九五"科技攻关项目 (98A2 811)
