Process for manufacturing an oxidation-stable component on a CFC base, particularly for space travel

US5380475A · kind A · utility

Assignee

• Deutsche Aerospace AG · DE

Inventors

• Peter Goedtke · Munich, DE
• Ernst Blenninger · Munich, DE
• Manfred Lechner
• Ulrich Papenburg · Egmating, DE
• Peter Sindlhauser · Obergünzburg, DE
• Ulrich Goetz · Buching, DE

Key dates

• Filing date: Nov 9, 1992
• Grant date: Jan 10, 1995
• Expiry date: Nov 9, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/30
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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.