蛇纹石粉体的水热合成及其摩擦学性能

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Serpentine powders by surface modification were synthesized through hydrothermal reaction with MgO and SiO2 as raw materials. The phase composition, morphology and surface structure of the synthesized powders were character- ized by X-ray diffraction （ XRD）, scanning electron microscopy （SEM） and infrared spectrometry （IR）. The synthesized ser- pentine powders were dispersed steadily in No. 46 mechanical oil, and its tribological properties were investigated in an MRS-10A four-ball friction and wear tester. The results show that the diameter of serpentine particles is about 1 -3 μm, and the organic agent is formed on the particles surface by chemical absorption. The extreme pressure and anti-wear proper- ties of the mechanical oil are improved obviously by serpentine powders, and the friction coefficient of the mechanical oil is reduced by 10. 49% and 5.16% when adding 1% and 2% of serpentine powders respectively. Serpentine powders contrib- ute significantly to preventing severe wear through anti-wear and self-repairing properties.以MgO和SiO2为原料，通过高温水热法合成表面修饰的蛇纹石粉体，利用X射线衍射仪、扫描电子显微镜和红外光谱仪表征粉体的物相组成、微观形貌和表面结构。将表面修饰的蛇纹石粉体稳定地分散在46#机械油中，利用MRS-10A四球摩擦磨损试验机考察其摩擦学性能。结果表明：合成粉体粒径为1～3μm，表面被有机物化学修饰；机械油中添加蛇纹石粉体后极压性能和抗磨性能显著提高，摩擦因数在添加量为1％和2％时分别降低10．49％和5．16％；蛇纹石粉体的抗磨和自修复作用对抑制摩擦副磨损加剧作用显著。