Creep behavior of a SiC-whisker-reinforced alumina

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.tb05208.x· OSTI ID:5900892

Lin, H T; Becher, P F ^[1]

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

Creep tests in four-point flexure loading configuration in air employing applied stresses of 37 to 300 MPa at temperatures of 1200{degrees}, 1300{degrees}, and 1400{degrees}C were performed on 20-vol%-SiC-whisker-reinforced alumina and unreinforced single-phase polycrystalline alumina. The creep rate of polycrystalline alumina was significantly reduced through the addition of SiC whiskers, although strain to failure was lower. Transmission and scanning electron microscopy results suggest that substantial increase in the creep resistance in flexure of alumina composites originates from the retardation of grain-boundary sliding by the SiC whiskers.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5900892
• 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
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COMPOSITE MATERIALS
CREEP
CRYSTALS
FLEXURAL STRENGTH
MATERIALS
MECHANICAL PROPERTIES
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
REINFORCED MATERIALS
SILICON CARBIDES
SILICON COMPOUNDS
WHISKERS