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Compressive Creep of SiC‐Whisker‐Reinforced Al 2 O 3
Author(s) -
ArellanoLópez Antonio R.,
Cumbrera Francisco L.,
DomínguezRodríguez Arturo,
Goretta Kenneth C.,
Routbort Jules L.
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb05194.x
Subject(s) - whisker , materials science , creep , composite material , argon , whiskers , activation energy , transmission electron microscopy , cavitation , scanning electron microscope , compressive strength , dislocation , stress (linguistics) , chemistry , nanotechnology , thermodynamics , linguistics , physics , philosophy , organic chemistry
Compressive creep of SiC‐whisker‐reinforced Al 2 O 3 composites (0, 5, 15, and 25 wt% SiC) was measured in the temperature range of 1300° to 1500°C in air and argon. The creep resistance increased with increasing whisker concentration. The results indicated that the whiskers degraded in air, increasing strain rates compared to those in argon. Stress exponents between 1.0 and 2.0 and an activation energy of 620 ± 100 kJ/mol were measured. Transmission electron microscopy observations indicated that cavitation was minimal and that the deformed composites had the same dislocation structure as did the as‐received samples.