High-Temperature Strength of Directionally Solidified Al2O3/YAG/ZrO2 Eutectic Composite

Abstract:

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A2O3/YAG/ZrO2 eutectic Melt-Growth-Composites (MGCs) were unidirectionally solidified by the modified-pulling-down method (MPD) and the Bridgman type method, in which a crucible was brought down at different speeds. The microstructures and crystallographic textures were studied by field emission scanning electron microscopy (FE-SEM) and electron backscattered pattern (EBSP) method. The high-temperature strength was investigated by compression tests. All MGC rods show strong preferred growing orientation, although the structural size of eutectic microstructure among MGC rods was different. The high-temperature strength of MGC rods is dependent on orientation, compression temperature and strain rate. The high-temperature strength of MGC rods is controlled by the anisotropic strength of constituent Al2O3, as well as the structural size of eutectic microstructure.

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:

1295-1300

DOI:

10.4028/www.scientific.net/MSF.475-479.1295

Citation:

Y. Murayama et al., "High-Temperature Strength of Directionally Solidified Al2O3/YAG/ZrO2 Eutectic Composite", Materials Science Forum, Vols. 475-479, pp. 1295-1300, 2005

Online since:

January 2005

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$35.00

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