Coating processes – Heat decomposition of applied coating or base material – Coating decomposed to form carbide or coating carbonized
Patent
1988-11-07
1990-06-26
Bell, Janyce
Coating processes
Heat decomposition of applied coating or base material
Coating decomposed to form carbide or coating carbonized
427370, 4274191, 4274192, 4274197, B05D 302
Patent
active
049371010
ABSTRACT:
The disclosure relates to a method of forming carbon-carbon composites wherein prereaction of the filler ingredients takes place prior to the prepregging operation, thereby ensuring that the sealant phase is both homogeneous and unsegregated on a microscopic scale. Composites prepared from several constituent inhibitor powders often have one inhibitor component segregated within the carbon fabric and fiber bundles during compaction, debulking and press curing. Composites prepared from prereacted powders have inhibitor constituents mixed on an atomic scale. Thus, the oxide sealant which forms from the prereacted particulate filler has an optimized composition with all of the desirable qualities, such as level viscosity, good wetting, low water solubility, low reactivity with the carbon fibers and carbon matrix during graphitization and low reactivity with the chemically vapor deposited coating.
REFERENCES:
patent: 3682686 (1972-08-01), Nakumura
patent: 4101354 (1978-07-01), Shaffer
patent: 4119189 (1978-10-01), Ehrenreich
patent: 4131708 (1978-12-01), Moores et al.
patent: 4321298 (1982-03-01), Shaffer
patent: 4339021 (1982-07-01), Kosuda
Bell Janyce
Cantor Jay M.
Rohr Industries, Inc.
Schlesinger Patrick J.
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