Off-axis creep behavior of oxide/oxide Nextel720/AS-0

Oxide/oxide ceramic-matrix composites (CMC) are being demonstrated in engine components that are axisymmetric in shape, and subject to axisymmetric thermo-mechanical loadings. Traditionally, woven CMC materials used in these components are made from 0 deg /90 deg fiber architectures. In many cases,...

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Bibliographic Details
Published in:Composites science and technology 2008-05, Vol.68 (6), p.1313-1320
Main Authors: Buchanan, Dennis J, John, Reji, Zawada, Larry P
Format: Article
Language:English
Online Access:Get full text
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Summary:Oxide/oxide ceramic-matrix composites (CMC) are being demonstrated in engine components that are axisymmetric in shape, and subject to axisymmetric thermo-mechanical loadings. Traditionally, woven CMC materials used in these components are made from 0 deg /90 deg fiber architectures. In many cases, the highest stresses are not always coincident with the orientation of the reinforcing fibers. Tensile and creeps tests at 1100 deg C on a +/-45 deg CMC composed of NextelTM720 fibers and a alumina-silica matrix (AS-0) have been performed. The +/-45 deg orientation has approximately two-thirds the ultimate tensile strength of the 0 deg /90 deg orientation. The creep rupture strength at 100h for the +/-45 deg orientation is approximately one-third that of the 0 deg /90 deg orientation.
ISSN:0266-3538
DOI:10.1016/j.compscitech.2007.12.013