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Failure mechanisms of 3-D woven SiC/SiC composites under tensile and flexural loading at room and elevated temperaturesNicalon silicon carbide 3D yarn with silicon carbide matrix composites made through a chemical vapor infiltration (CVI) process were investigated under tensile and flexural loading at 23, 1200 and 1550 C in air. The effectiveness of a chemical vapor deposition (CVD) SiC surface coating was also evaluated in severe oxidizing environment. Acoustic emission sensors and in situ optical microscopy were used at room temperature to monitor the failure mechanisms. It is shown that the level of tensile stress at which nonlinear behavior begins is not drastically reduced at 1200 and 1550 C when composites were protected by a SiC surface coating. Extensive fiber pull-out was observed only in the 1550 C specimen. Similar behaviors were also found in flexural specimens.
Document ID
19920057018
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chulya, Abhisak
(NASA Lewis Research Center Cleveland, OH, United States)
Gyekenyesi, John Z.
(Cleveland State University OH, United States)
Gyekenyesi, John P.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Ceramic Engineering and Science Proceedings
Volume: 13
Issue: 7-8,
ISSN: 0196-6219
Subject Category
Composite Materials
Accession Number
92A39642
Distribution Limits
Public
Copyright
Other

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