Anelastic creep recovery of alumina reinforced with SiC whiskers or particulates

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:96544

Gu, W; Langdon, T G ^[1]; Porter, J R ^[2]

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1. Univ. of Southern California, Los Angeles, CA (United States)
2. Rockwell International Science Center, Thousand Oaks, CA (United States)

Experiments were conducted to determine the anelastic response of samples of monolithic Al{sub 2}O{sub 3} and Al{sub 2}O{sub 3} composites reinforced with SiC whiskers or particulates. For each material, the load was removed during high temperature creep and the subsequent load-displacement response was recorded. The results show that the monolithic material and a composite with 5 vol % of SiC particulates exhibit no anelastic response on load removal, but there is significant anelastic recovery in composites reinforced with 15 vol %of SiC whiskers or with 15 vol % of SiC particulates. The results are interpreted in terms of the hypothesis that there is an anelastic creep recovery whenever there is some form if interconnecting network within the material.

• OSTI ID: 96544
• Report Number(s): CONF-940416--; CNN: DAAL03-91-G-0230
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CREEP
HOT PRESSING
MECHANICAL PROPERTIES
MICROSTRUCTURE
SILICON CARBIDES
STRAINS
TEMPERATURE DEPENDENCE
WHISKERS