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HomeMaterials Science ForumMaterials Science Forum Vols. 475-479High-Temperature Strength of Directionally...

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

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Abstract:

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.

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Periodical:

Materials Science Forum (Volumes 475-479)

Pages:

1295-1300

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.1295

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Online since:

January 2005

Authors:

Yonosuke Murayama, Shuji Hanada, Jong Ho Lee, Akira Yoshikawa, Kazutoshi Shimizu, Narihito Nakagawa, Yoshikawa Waku, Tsuguo Fukuda

Keywords:

Al₂O₃/YAG/ZrO₂ Eutectic Composite, Crystallographic Texture, Electron Backscattered Pattern (EBSP), High Temperature Strength, Melt-Growth-Composite MGC, Strength Anisotropy

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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