Silicon carbide monofilaments for improved composite properties and method
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United States of America Patent
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Feb 6, 1990
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N/A
app pub date -
Nov 28, 1988
filing date -
Nov 28, 1988
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Expired
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Abstract
A high strength silicon carbide monofilament which has a core and a stoichiometric bulk layer of silicon carbide deposited on the core having an exterior surface and a core bulk layer interface, the bulk layer having an average grain size of less than 200 nanometers which size varies continuously across the cross section of the bulk layer, the variation comprising a first average grain size at the interface which increases to a maximum average grain size intermediate the interface and the exterior surface and then decreases to the minimum at the exterior surface. In an alternate embodiment a surface layer is deposited on the bulk layer of silicon carbide. A preferred method of making the silicon carbide monofilament is also presented.
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