Papers by Keyword: Chemical Compatibility

Abstract: Chemical compatibility of self-lubricating ceramic tool materials, such as Al₂O₃/TiC/MoS₂, Al₂O₃/TiC/h-BN, Al₂O₃/TiC/CaF₂, were analyzed and calculated, and the results were verified by X-ray diffraction patterns. The optimal volume content of solid lubricant was calculated by the thermal stress theory under specific condition. The results show that under high temperature, there were some reactions in Al₂O₃/TiC/MoS₂ and Al₂O₃/TiC/h-BN, while there were no reactions in Al₂O₃/TiC/CaF₂. To Al₂O₃/TiC/CaF₂, the optimal volume content of CaF₂ is 25.1% under specific condition.

Abstract: For friction design, the antifriction model of self-lubricating tool was built. Al₂O₃/TiC/CaF₂ was prepared, and the chemical compatibility of Al₂O₃/TiC/CaF₂ 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 Al₂O₃/TiC/CaF₂. 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.