Effect of aspect ratio and liquid-phase content on densification of alumina-silicon carbide whisker composites

Journal Article · Tue May 01 00:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb05222.x· OSTI ID:6072182

Tiegs, T N; Dillard, D M ^[1]

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1. Oak Ridge National Lab., TN (USA). Metals and Ceramics Div.

This paper reports that densification of alumina-SiC whisker composites by pressureless sintering is inhibited as a result of whisker interference with particle rearrangement and composite shrinkage. Reduction of the aspect ratio improves densification by improving particle/whisker packing for increased green densities and enhances the ability of the whiskers to rearrange themselves during sintering. Increasing the amount of liquid phases present during sintering also improves densification by aiding whisker rearrangement.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6072182
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:5; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360601 -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COMPOSITE MATERIALS
CRYSTAL STRUCTURE
CRYSTALS
DENSITY
EPITAXY
FABRICATION
GRAIN BOUNDARIES
LIQUID PHASE EPITAXY
MATERIALS
MICROSTRUCTURE
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICON CARBIDES
SILICON COMPOUNDS
SINTERING
WHISKERS