Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – With carbonizing – then adding carbonizable material and...
Patent
1992-11-09
1995-01-10
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
With carbonizing, then adding carbonizable material and...
264 60, 264162, 4234472, 427228, 427249, 427250, 428408, C04B 3552, C08K 706
Patent
active
053804759
ABSTRACT:
For the manufacturing of an oxidation-stable component that can withstand temperature changes for space travel, a solid CFC-body with a density of from 0.1 to 0.8 g/cm.sup.3, which has nondirectional short fibers, is made from short carbon fibers and a hardenable resin binder. From the solid CFC-body, a CFC-blank having the dimensions of the component to be manufactured is prepared by means of turning or other material cutting. The CFC-blank is infiltrated with pyrolytic carbon to a density of no more than 1.0 g/cm.sup.3 and then with metallic silicon so that its density amounts to more than 2.0 g/cm.sup.3. A portion of the metallic silicon is reacted with the pyrolytic carbon to form silicon carbide. The proportion of the unreacted metallic silicon which remains in the component after this reaction amounts to at least 15 percent by weight.
REFERENCES:
patent: 4029844 (1977-06-01), Olcott
patent: 4201611 (1980-05-01), Stover
patent: 4508762 (1985-04-01), Rousseau
patent: 4514346 (1985-04-01), Luhleich et al.
Blenninger Ernst
Goedtke Peter
Goetz Ulrich
Lechner Manfred
Papenburg Ulrich
Deutsche Aerospace
Vargot Mathieu D.
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