| Summary: | Aiming at the contradiction between the lubricating performance and mechanical performance of self-lubricating ceramic tools. CaF<sub>2</sub>@Al(OH)<sub>3</sub> particles were prepared by the heterogeneous nucleation method. An Al<sub>2</sub>O<sub>3</sub>/Ti(C,N) ceramic tool with CaF<sub>2</sub>@Al<sub>2</sub>(OH)<sub>3</sub> particles and ZrO<sub>2</sub> whiskers was prepared by hot press sintering (frittage). The cutting performances and wear mechanisms of this ceramic tool were investigated. Compared with the Al<sub>2</sub>O<sub>3</sub>/Ti(C,N) ceramic tool, the Al<sub>2</sub>O<sub>3</sub>/Ti(C,N)/ZrO<sub>2</sub>/CaF<sub>2</sub>@Al(OH)<sub>3</sub> ceramic tool had lower cutting temperatures and surface roughness. When the cutting speed was increased from 100m/min to 300m/min, a lot of CaF<sub>2</sub> was smeared onto the surface of the ceramic tool, and the flank wear of the Al<sub>2</sub>O<sub>3</sub>/Ti(C,N)/ZrO<sub>2</sub>/CaF<sub>2</sub>@Al(OH)<sub>3</sub> ceramic tool was reduced. The main wear mechanisms of the Al<sub>2</sub>O<sub>3</sub>/Ti(C,N)/ZrO<sub>2</sub>/CaF<sub>2</sub>@Al(OH)<sub>3</sub> ceramic tool were adhesive wear and micro-chipping. The formation of solid lubricating film and the improvement of fracture toughness by adding ZrO<sub>2</sub> whiskers and CaF<sub>2</sub>@Al(OH)<sub>3</sub> were important factors for the Al<sub>2</sub>O<sub>3</sub>/Ti(C,N)/ZrO<sub>2</sub>/CaF<sub>2</sub>@Al(OH)<sub>3</sub> ceramic tool to have better cutting performances.
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