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四硫代钼酸镉(CdMoS_4)的摩擦磨损性能和机理

LUBRICATION MECHANISM OF CADMIUM TETRATHIOMOLYBDATE
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摘要 合成了四硫代铂酸锅(CdMoS4)粉末,采用热重分析评价了其热稳定性,用 X光电子能谱(XPS)及 X射线衍射(XRD)分析了摩擦表面,研究了其作为固体润滑剂在室温至 500 ℃下的摩擦磨损行为结果表明, Sialon陶瓷-钢摩擦副在 CdMoS4润滑下在从室温到 400 ℃的温度范围内具有较低的摩擦系数,CdMoS4粉末在摩擦过程中发生了摩擦化学反应,硫元素将钼还原为低价态的二硫化钼,从而降低了摩擦系数. A potential high temperature lubricant cadmium tetrathiomolybdate (CdMoS4) was prepared. Thermal gravimetric analysis (TGA) was used to examine its thermal stability, and a high temperature ball-on-disc friction and wear tester was used to evaluate its lubricity for a Sialon ceramic/W18Cr4V steel pair from room temperature to 500°C. The worn surface of the W18Cr4V steel disc was analyzed with X-ray photoelectron spectroscopy (XPS) and X-ray diffraction. The results show that CdMoS4 has good lubricity from room temperature to 400°C, and the friction coefficient increases slowly with the increase of temperature. CdMoS4 experiences tribochemical reaction during friction process, and the high valence Mo was deoxidized by S with the formation of MoS2, so the friction coefficient decreases.
出处 《材料研究学报》 EI CAS CSCD 北大核心 2001年第3期367-371,共5页 Chinese Journal of Materials Research
基金 国家杰出青年基金资助项目59825116
关键词 四硫代钼酸镉 润滑机理 摩擦磨损 润滑剂 高温润滑 Friction Lubricants Lubrication Thermodynamic stability
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