Microstructure and mechanical properties of mullite-sialon composites

Microstructure and mechanical properties of mullite-sialon composites

The microstructure of the mullite--X-phase composites made by reaction of beta -sialon and mullite is a mixture of needle-shaped particles (15 mu m) and fine particles (1 mu m). The amount of liquid phase in the composites decreases with increasing amount of X-phase. Neither cracks nor liquid phase...

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Veröffentlicht in:Journal of the Japan Society of Powder and Powder Metallurgy 1990, Vol.37 (2), p.367-370
Hauptverfasser: Yamagishi, Chitake, Yoshida, Hideto, Kamiaka, Hideto, Asaumi, Junji, Miyata, Noboru
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Sprache:eng ; jpn
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container_end_page 370
container_issue 2
container_start_page 367
container_title Journal of the Japan Society of Powder and Powder Metallurgy
container_volume 37
creator Yamagishi, Chitake
Yoshida, Hideto
Kamiaka, Hideto
Asaumi, Junji
Miyata, Noboru
description The microstructure of the mullite--X-phase composites made by reaction of beta -sialon and mullite is a mixture of needle-shaped particles (15 mu m) and fine particles (1 mu m). The amount of liquid phase in the composites decreases with increasing amount of X-phase. Neither cracks nor liquid phase are observed at the boundary between the X-phase and mullite. The flexural strength of the composites at 1300 deg C increases in proportion to the amount of beta -sialon addition, the composite with 10 vol.% beta -sialon having the same flexural strength that mullite shows at room temperature. The fracture toughness of the composites at room temperature is improved compared with that of mullite. Graphs, Photomicrographs. 4 ref.--AA
doi_str_mv 10.2497/jjspm.37.367
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title Microstructure and mechanical properties of mullite-sialon composites
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