Process for preparing carbon material
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United States of America Patent
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Mar 3, 1992
Grant Date -
N/A
app pub date -
Jul 26, 1990
filing date -
Jul 27, 1989
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Expired
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Abstract
A carbon material having oxidation resistance is prepared by forming a fi coating constituted mainly by carbon on the surface of a carbon/carbon composite by chemical vapor deposition, then forming on said first coating a second coating of a ceramic or both a ceramic and carbon by chemical vapor deposition, and changing at least one of thermal physical properties or mechanical physical properties of carbon in said first coating continuously or step-wise.
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