Mechanical properties of alumina/silicon carbide whisker composites

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb05995.x· OSTI ID:6837461

Lio, S; Watanabe, M; Matsubara, M; Matsuo, Y ^[1]

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1. NGK Spark Plug Co., Ltd., Komaki, Aichi 485 (JP)

This paper reports the improvement of mechanical properties of Al{sub 2}O{sub 3}/SiC whisker composites studied with emphasis on the effects of the whisker content and of the hot-pressing temperature. Mechanical properties such as fracture toughness and fracture strength increased with increasing whisker content up to 40 wt%. In the case of the high SiC whisker content of 40 wt%, fracture toughness of the sample hot-pressed at 1900{degrees} C decreased significantly, in spite of densification, compared with one hot-pressed at 1850{degrees}C. Fracture toughness strongly depended on the microstructure, especially the distribution of SiC whiskers rather than the grain size of the Al{sub 2}O{sub 3} matrix.

• OSTI ID: 6837461
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 72:10; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
FABRICATION
FRACTURE PROPERTIES
HOT PRESSING
MATERIALS
MATERIALS WORKING
MECHANICAL PROPERTIES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PRESSING
SILICON CARBIDES
SILICON COMPOUNDS
SUPERCONDUCTING COMPOSITES