Microstructure and Thermal Shock Resistance of LaPO4-ZrO2

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1633-1635

DOI:

10.4028/www.scientific.net/KEM.368-372.1633

Citation:

Z. Q. Li et al., "Microstructure and Thermal Shock Resistance of LaPO4-ZrO2", Key Engineering Materials, Vols. 368-372, pp. 1633-1635, 2008

Online since:

February 2008

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Price:

$35.00

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