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

Abstract:

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 ln (ln (1/(1 − f )))-ln t and ln b-1/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.

• Periodical: Advanced Materials Research (Volumes 105-106)
• Pages: 100-103
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.105-106.100
• Online since: April 2010
• Authors: Qi Fei Xie, Cheng Wang, Qing Feng Zan, Li Min Dong
• Keywords: Grain Size, Kinetic Parameter, Low Temperature Aging, Y-TZP Ceramic

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