Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – With carbonizing – then adding carbonizable material and...
Reexamination Certificate
2011-04-19
2011-04-19
Johnson, Christina (Department: 1742)
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
With carbonizing, then adding carbonizable material and...
C264S103000, C264S171100
Reexamination Certificate
active
07927523
ABSTRACT:
Method of manufacturing pitch-based carbon-carbon composite useful as a brake disc, by: (a) providing annular carbon fiber brake disc preform; (b) heat-treating the carbon fiber preform; (c) infiltrating the carbon fiber preform with pitch feedstock by VPI or RTM processing; (d) carbonizing the pitch-infiltrated carbon fiber preform; (e) repeating steps (c) and (d) to achieve a density in the carbon fiber preform of approximately 1.5 g/cc to below 1.7 g/cc; and (f) densifying the preform by CVI/CVD processing to a density higher than 1.7 g/cc. Employing lower cost VPI and/or RTM processing in early pitch densification cycles and using more expensive CVI/CVD processing only in the last densification cycle provides C-C composites in which the pitch-based components resist pullout, resulting in a longer wearing composite.
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La Forest Mark L.
Murdie Neil
Simpson Allen H.
Honeywell International , Inc.
Johnson Christina
Shumaker & Sieffert P.A.
Thrower Larry
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