Composite ceramics of cubic or tetrahedral ZrO2 phase on the microstructure, phase composition,bending strength,fracture toughness as well as ionic resistivity were tested and the mechanisms were discussed.The results showed that small amount of ZrO2, especially the partial-stabilized t-phase which can transform to m-phase under stress,could effectively improve the properties of single phase β"-Al2O3 ceramics.
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