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合成了四硫代钼酸锌粉末并考察了其作为固体润滑剂在室温至 5 0 0℃下的润滑作用 ;同时采用热重分析对其热稳定性进行了评价 ,用 X射线光电子能谱对磨损表面典型元素的化学状态进行了分析 .结果表明 :四硫代钼酸锌在大气中的第一分解温度为 2 35 .5℃ ,第二分解温度为 71 0 .8℃ ,分解产物为 Zn Mo O4;在 N2 中的分解温度为 36 2 .8℃和 5 0 7.8℃ ,产物分别为 Zn Mo S2 和 Zn Mo S.摩擦磨损试验结果表明 ,Sialon陶瓷 /钢摩擦副在 Zn Mo S4润滑下从室温到 5 0 0℃下的摩擦系数较低 ,但是摩擦系数随温度的升高而增大 (由室温下的 0 .0 6增大到 5 0 0℃下的 0 .1 8) ,X射线光电子能谱分析表明在摩擦过程中 S元素被氧化并生成 Zn SO4.
The zinc tetrathiomolybdate powder was synthesized and its lubricating properties as a solid lubricant at room temperature to 500 ℃ were investigated. The thermal stability of the powder was also evaluated by thermogravimetric analysis. X-ray photoelectron spectroscopy The results show that the first decomposition temperature of zinc tetrathiomolybdate in the atmosphere is 235.5 ℃, the second decomposition temperature is 71.0.8 ℃, and the decomposition products are Zn Mo O4; the decomposition temperature in N2 is 36 2 .8 ℃ and 5 0 7.8 ℃, and the products are Zn Mo S2 and Zn Mo S. The results of friction and wear tests show that under the lubrication of Zn Mo S4, the Sialon ceramic / The coefficient of friction from room temperature to 500 ° C is lower, but the coefficient of friction increases with increasing temperature (from 0.06 at room temperature to 0.018 at 500 ° C). X X-ray photoelectron spectroscopy analysis showed that S element was oxidized and Zn SO4 was generated during the rubbing process.