Paper Title:

Microstructure and Thermal Shock Resistance of LaPO4-ZrO2

Periodical Key Engineering Materials (Volumes 368 - 372)
Main Theme High-Performance Ceramics V
Edited by Wei Pan and Jianghong Gong
Pages 1633-1635
DOI 10.4028/www.scientific.net/KEM.368-372.1633
Citation Zhong Qiu Li et al., 2008, Key Engineering Materials, 368-372, 1633
Online since February, 2008
Authors Zhong Qiu Li, Jia Chen Liu, Shun Li, Bing Zhou, Wei Jing
Keywords Ceramic, LaPO4, Thermal Shock Resistance, Weak Bonding Interface
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Abstract

LaPO4-ZrO2 composites were prepared by slip casting and pressureless-sintered in air. The effects of LaPO4 addition on microstructure and thermal shock resistance were addressed. The thermal shock resistance of the composites was evaluated by air quenching and a subsequent three-point bending test to determine the strength degradation. Comparisons were made with results from parallel experiments conducted using a ZrO2 ceramic without LaPO4 additions. The reference ZrO2 ceramic showed the expected substantial strength losses when thermally quenched from 470oC above room temperature. By contrast, the LaPO4-ZrO2 ceramics, while displaying reduced strength relative to the reference ZrO2 ceramics, exhibited minimal strength degradation under severe thermal shock conditions.