摘要
采用四球摩擦磨损试验机考察了硼酸钠、硼酸钾和氯化镧在水介质中的极压、抗磨和减摩性能,采用扫描电镜(SEM)、X射线能谱(EDX)、X射线光电子能谱(XPS)分析了磨斑表面形貌、主要元素的分布特征和化学状态。结果表明,硼酸钠、硼酸钾和氯化镧可一定程度地提高水的极压、抗磨和减摩性能,硼酸钾性能最优,硼酸盐与氯化镧复合后性能进一步改善。硼酸盐与氯化镧复合前摩擦表面擦伤严重,复合后擦伤明显减小,表面形成的La2O3,B2O3,Fe3O4和Fe2O3起到了良好的极压、抗磨和减摩作用。
The antiwear and friction-reducing performances of sodium borate, potassium borate and lanthanum chloride in water were evaluated on a four-ball friction tester. The topographies, element distributions and chemical characteristics of the worn surfaces were investigated by Scanning Electron Microscope （SEM）, Energy Dispersion of X-ray （EDX） and X-ray Photoelectron Spectroscope （ XPS ）. The results indicated that sodium borate, potassium borate and lanthanum chloride increase extreme pressure, antiwear and friction-reducing capacities of water to a certain extent, of which potassium borate is the best candidate. Combination of lanthanum chloride with sodium borate and potassium borate respectively can further improves antiwear and friction-reducing capacities. Scratches of worn surfaces lubricated with water containing borates and lanthanum chloride were less severe than those lubricated with water containing borates alone. A tribochemical film mainly composed of oxides of lanthanum, boron and iron reduces friction and wear for water lubricant formulated with both borates and lanthanum chloride.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2008年第1期46-49,共4页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金(50275147)
教育部"新世纪优秀人才支持计划"(NCET-04-1002)"重庆市高校创新团队建设计划"资助项目
关键词
硼酸盐
氯化镧
水
摩擦
磨损
稀土
borate
lanthanum chloride
water
friction
wear
rare earths
