Design and Preparation of Al_2O_3/TiC/CaF_2 Self-lubricating Ceramic Tool

摘要

For friction design, the antifriction model of self-lubricating tool was built. Al_2O_3/TiC/CaF_2 was prepared, and the chemical compatibility of Al_2O_3/TiC/CaF_2 was analyzed and calculated and the results were verified by X-ray diffraction patterns. The microstructure design of self-lubricating tool material was discussed. The results show that it can reduce the friction coefficient if solid lubricating film can be produced on the friction interface, even the lubricating film can't completely be formed on the friction interface. Under high temperature, there were no reactions in Al_2O_3/TiC/CaF_2. To form continuous net structure of matrix and reduce the friction, the solid lubricants content should be moderate. According to analysis of the particle packing ways, the radius ratio between solid lubricant particles and ceramic matrix particles was confirmed and it should be within the scope of 0.225 ≤ r / R ≤ 0.414.