Processing and Microstructure of an All-Oxide Ceramic Composite

Abstract:

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An all-oxide composite consisting of alumina fiber, alumina matrix, and barium zirconate interphase has been investigated. The barium zirconate interphase was applied on alumina fibers through coating via a sol-gel route. The incorporation of the coatings did not significantly influence the densification behavior of the composite under hot-pressing conditions. During the processing of the composite, the barium zirconate reacted in situ with alumina fiber and alumina matrix to form Ba-β-alumina platelets with an elongated morphology, which is propitious for crack deflection and thus toughness enhancement. The results reveal that it is possible to reduce fiber strength degradation by controlling the coating and densification processes.

Info:

Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

1301-1304

DOI:

10.4028/www.scientific.net/MSF.475-479.1301

Citation:

Z.C. Chen et al., "Processing and Microstructure of an All-Oxide Ceramic Composite", Materials Science Forum, Vols. 475-479, pp. 1301-1304, 2005

Online since:

January 2005

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Price:

$35.00

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