Moderate temperature plastic deformation in amorphous Al 2 O 3 –ZrO 2 ceramics containing different amount of nanocrystals

Abstract

The differences in the deformation behaviour and the microstructures among the amorphous Al₂O₃–ZrO₂ ceramics containing different amount of nanocrystals were investigated. Therein, the amorphous sample without nanocrystals displayed large plastic deformation due to its large free volume change. With the increase in nanocrystals, the yield strength and plasticity of Al₂O₃–ZrO₂ ceramics were promoted. However, excess nanocrystals would induce the decrease in the plasticity.