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Effects of matrix structure on mechanical properties of carbon/carbon composites

✍ Scribed by Seh-Min Oh; Jai-Young Lee

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
707 KB
Volume
26
Category
Article
ISSN
0008-6223

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✦ Synopsis

Mechanical properties of carbon/carbon composites prepared by thermal-gradient CVD technique were investigated by three-point flexural tests. The mechanical properties are strongly influenced by the matrix structure, which in turn depends on the deposition conditions employed. The lower fracture stress and elastic modulus of isotropic structure and columnar structure are due to the low matrix density and to the presence of matrix cracks, respectively. The transition structure shows relatively high modulus and stress. The fracture strain remains almost constant over the whole ranges investigated.

The role of the matrix crack during the fracture is discussed.

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