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Tensile creep and creep-recovery behavior of a SiC-fiber-Si3N4-matrix compositeThe tensile creep and creep-recovery behavior of a hot-pressed unidirectional SiC-fiber/Si3N4-matrix composite was investigated at 1200 C in air, in order to determine how various sustained and cyclic creep loading histories would influence the creep rate, accumulated creep strain, and the amount of strain recovered upon specimen unloading. The data accumulated indicate that the fundamental damage mode for sustained tensile creep at stresses of 200 and 250 MPa was periodic fiber fracture and that the creep life and the failure mode at 250 MPa were strongly influenced by the rate at which the initial creep stress was applied. Cyclic loading significantly lowered the duration of primary creep and the overall creep-strain accumulation. The implications of the results for microstructural and component design are discussed.
Document ID
19930056293
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Holmes, John W.
(NASA Lewis Research Center Cleveland, OH, United States)
Park, Yong H.
(NASA Lewis Research Center Cleveland, OH, United States)
Jones, J. W.
(Michigan Univ. Ann Arbor, United States)
Date Acquired
August 16, 2013
Publication Date
May 1, 1993
Publication Information
Publication: American Ceramic Society, Journal
Volume: 76
Issue: 5
ISSN: 0002-7820
Subject Category
Composite Materials
Accession Number
93A40290
Distribution Limits
Public
Copyright
Other

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