Polymorphic transformation of ZrO 2 in the 75 wt % Al 2O 3 + 25 wt % ZrO 2 alloy solidified under nonequilibrium conditions

Abstract

This paper examines the α-ZrO 2 → β-ZrO 2 polymorphic transformation in 75 wt % Al 2O 3 + 25 wt % ZrO 2 alloys solidified under nonequilibrium conditions and then heat-treated under various conditions. The strength of the alloys is shown to be more sensitive to β-ZrO 2 content than to the size of their microstructural constituents. © 2010 Pleiades Publishing, Ltd.