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Polymer Derived, Stoichiometric SiC Fibers

Published online by Cambridge University Press:  15 February 2011

J. Lipowitz ,
J. A. Rabe ,
L. D. Orr  and
R. R Androl
J. Lipowitz
Affiliation:
Dow Coming Corporation, Midland, MI 48686
J. A. Rabe
Affiliation:
Dow Coming Corporation, Midland, MI 48686
L. D. Orr
Affiliation:
Dow Coming Corporation, Midland, MI 48686
R. R Androl
Affiliation:
Dow Coming Corporation, Midland, MI 48686
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Abstract

Polycrystalline, stoichiometric β- silicon carbide fiber tow suitable for ceramic or metallic matrix composite use has been prepared using a polymer precursor route to obtain textile grade, weavable fibers. Individual filaments have a diameter of 10 μm, an average tensile strength of up to 3.4 GPa (500 ksi), an elastic modulus up to 430 GPa (62 msi) and a density > 3.1 g/cm3. Crystallites average about 60 nm by x-ray line broadening. The SiC fiber shows improved mechanical and thermal stability properties, especially in an inert atmosphere, as compared to commercial polymer-derived SiC ceramic fibers. Thermochemical and mechanical properties, as well as fractography and microstructure will be presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 350: Symposium U – Intermetallic Matrix Composites III , 1994 , 99
Copyright
Copyright © Materials Research Society 1994

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