Aiming at the contradiction between the lubricating performance and mechanical performance of self-lubricating ceramic tools. CaF@Al(OH) particles were prepared by the heterogeneous nucleation method. An AlO/Ti(C,N) ceramic tool with CaF@Al(OH) particles and ZrO whiskers was prepared by hot press sintering (frittage). The cutting performances and wear mechanisms of this ceramic tool were investigated. Compared with the AlO/Ti(C,N) ceramic tool, the AlO/Ti(C,N)/ZrO/CaF@Al(OH) 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 was smeared onto the surface of the ceramic tool, and the flank wear of the AlO/Ti(C,N)/ZrO/CaF@Al(OH) ceramic tool was reduced. The main wear mechanisms of the AlO/Ti(C,N)/ZrO/CaF@Al(OH) ceramic tool were adhesive wear and micro-chipping. The formation of solid lubricating film and the improvement of fracture toughness by adding ZrO whiskers and CaF@Al(OH) were important factors for the AlO/Ti(C,N)/ZrO/CaF@Al(OH) ceramic tool to have better cutting performances.
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| http://dx.doi.org/10.3390/ma12233820 | DOI Listing |
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