Apparent Activation Energy in Low Temperature Aging of Y-TZP Ceramics

摘要

Apparent activation energy in low temperature aging of two kinds of Y-TZP ceramic was studied in this paper.The ceramics were processed into small pieces,and aging in 100°C,110°C,120°C,130°C and 140°C respectively.The content of monoclinic phase was calculated by X-ray diffraction patterns and the microstructure was scanned by SEM.According to MAJ law and Arrhenius formation,straight lines were fitted in coordinate systems of In (In (1/(1-f)))-In t and In b-l/T,and the kinetic parameters of low temperature aging of Y-TZP ceramic were calculated according to these lines.The results revealed that grain size significantly affected apparent activation energy of Y-TZP ceramics.