Effect of MgO particle size on the microstructure, mechanical properties and wear performance of ZTA-MgO ceramic cutting inserts

► The effect of MgO particle sizes on ZTA-MgO cutting inserts was studied. ► Addition of nano additives improve wear performance of the ZTA-MgO cutting inserts. ► Wear performance of ZTA-MgO cutting inserts were influenced by several factors. ► Fine MgO particle size is vital to produced high performance ZTA-MgO cutting inserts.