Influence of CaF(2)@Al(2)O(3) on Cutting Performance and Wear Mechanism of Al(2)O(3)/Ti(C,N)/CaF(2)@Al(2)O(3) Self-Lubricating Ceramic Tools in Turning

This study aimed at improving the cutting performance of a ceramic tool to which were added solid lubricant particles. We prepared the self-lubricating ceramic tool by adding CaF(2)@Al(2)O(3) instead of CaF(2), and the self-lubricating ceramic tool with Al(2)O(3) as matrix phase, Ti(C,N) as reinforcement phase. The properties of the ceramic tool with different contents of CaF(2)@Al(2)O(3) and CaF(2) were studied by turning 40Cr. Compared with the ceramic tool with 10 vol.% CaF(2), the main cutting force and the cutting temperature of the ceramic tool with 10 vol.% CaF(2)@Al(2)O(3) decreased by 67.25% and 38.14% respectively. The wear resistance and machining surface quality of the ceramic tool with CaF(2)@Al(2)O(3) were better than the ceramic tool to which were directly added CaF(2). The optimal content of CaF(2)@Al(2)O(3) particles was determined to be 10 vol.%. The addition of CaF(2)@Al(2)O(3) particles effectively reduces the adverse effect of direct addition of CaF(2) particles on the ceramic tool, and plays a role in improving the cutting performance of the ceramic tool.