Title: Oxidation and fracture of a woven 2D carbon-carbon composite
Abstract: Measurements were made of flexural strength and dynamic elastic modulus of a woven, 2D carbon-carbon composite before and after oxidation in flowing, dry air. The microstructure and fracture surfaces were examined using optical and scanning electron microscopy. Oxidation preferentially attacks the fibre/matrix interfaces and weakens fibre bundles. The unoxidised material fails catastrophically by delamination cracking between plies and at bundle/bundle interfaces within plies. As oxidation progresses, failure becomes a multistep process with less delamination cracking and more cross-bundle cracking. This change of mode of failure with oxidation is attributed to more severe attack within bundles than at bundle/bundle interfaces. For a weight loss on oxidation of 10%, the reduction in elastic modulus and flexural strength was 30% and 50% respectively.
Publication Year: 1991
Publication Date: 1991-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 63
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