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分别采用水溶液沉淀法和乙醇溶液沉淀法制备了蛇纹石/La复合粉体,并分别在120℃(脱除吸附水)和700℃(蛇纹石脱除羟基)对复合粉体进行了干燥和煅烧热处理。利用X射线衍射法、扫描电子显微镜、能谱分析表征了复合粉体的物相组成、微观形貌。利用MM-10W型多功能摩擦磨损试验机对复合粉体的摩擦性能进行了评价。结果表明:蛇纹石/La复合粉体中,La化合物呈纳米颗粒,并包覆在蛇纹石表面;700℃煅烧将导致蛇纹石/La复合粉体物相变化和摩擦性能变差;120℃干燥处理的蛇纹石/La复合粉体具有良好的减摩-抗磨性能,摩擦因数较未添加者降低22.48%以上。
Serpentine / La composite powders were prepared by aqueous solution precipitation and ethanol precipitation respectively. The composite powders were dried at 120 ℃ (removal of adsorbed water) and 700 ℃ (serpentine removal of hydroxyl groups) respectively And calcination heat treatment. The phase composition and microstructure of the composite powders were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The tribological properties of the composite powders were evaluated by MM-10W multi-purpose friction and wear tester. The results show that the La compound in the serpentine / La composite powders is nano-particles and coated on the serpentine surface. The calcination at 700 ℃ will cause the phase change and the tribological properties of the serpentine / La composite powders to deteriorate. The serpentine / La composite powder dried at 120 ℃ has good anti-friction and anti-wear properties, and the friction coefficient is reduced by more than 22.48% compared with the non-additive.