Al2O3-TiC/Al2O3-TiC-CaF2复合叠层陶瓷材料摩擦磨损性能

将Al₂O₃-TiC陶瓷材料与具有固体润滑特性的Al₂O₃-TiC-CaF₂陶瓷材料进行叠层, 通过真空热压烧结制备Al₂O₃-TiC/Al₂O₃-TiC-CaF₂复合叠层陶瓷材料。在环盘式摩擦磨损试验机上进行摩擦磨损实验, 研究该材料在不同载荷、 转速条件下的摩擦系数和磨损率, 分别用SEM及EDS观察材料磨损前后的微观形貌和分析其成分组成, 研究其磨损机制。结果表明: 在相同载荷条件下, Al₂O₃-TiC/Al₂O₃-TiC-CaF₂复合叠层陶瓷材料的摩擦系数和磨损率随着转速的升高而下降, 在相同转速条件下, 其摩擦系数和磨损率随着载荷的增加而下降; Al₂O₃-TiC/Al₂O₃-TiC-CaF₂复合叠层陶瓷材料的磨损机制主要是磨粒磨损和黏着磨损。

Friction and wear properties of Al2O3-TiC/Al2O3-TiC-CaF2 composite laminated ceramic

A kind of Al₂O₃-TiC/Al₂O₃-TiC-CaF₂ laminated composite ceramic layered stack by Al₂O₃-TiC ceramic and self-lubricating Al₂O₃-TiC-CaF₂ composite was prepared by vacuum hot pressing sintering. The friction and wear behaviors and wear mechanism of laminated composite were researched though the ring-disc friction and wear tester in different load conditions and rotation speeds, the worn morphology was observed by SEM and the elements were investigated by EDS. Results show that the friction coefficient and wear rate decline when the rotation speed increases at the same load conditions, and also decrease with the increase of the load with the same rotating speed. The main wear mechanisms of Al₂O₃-TiC/Al₂O₃-TiC-CaF₂ laminated composite are abrasive wear and adhesive wear.