Tetragonal—Monoclinic Phase Transition Enthalpy and Temperature of ZrO ₂ ‐CeO ₂ Solid Solutions

Abstract

DSC (differential scanning calorimeter) measurements were performed to investigate the tetragonal‐monoclinic ( t‐m ) transition enthalpy of the compositionally homogeneous ZrO 2 ‐ X mol% CeO 2 solid solution of X = 0, 4, 8, and 12. The transition enthalpy decreases linearly with an increase of CeO 2 content. The m → t transition enthalpy on heating agreed well with the inverse t → m one obtained during cooling. With increasing X , the DSC peak broadens and the transition temperature distribution of each sample increases, while the thermal hysteresis is almost independent of X .