Regulation of pyrolysis methane concentration in the manufacture of graphite fibers
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United States of America Patent
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Jan 21, 1986
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N/A
app pub date -
Dec 21, 1984
filing date -
Aug 20, 1984
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Abstract
In a preferred embodiment, graphite fibers are grown on a suitably nucleated ceramic surface by passing a methane gas stream over the surface at an elevated temperature. Initially, the methane concentration in the gas stream is adjusted to between 5 and 15 volume percent to form microscopic carbon filaments. Thereafter, the methane concentration is increased to above 25 volume percent to thicken the filaments into fibers.
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