Process for producing shaped bodies comprising fiber-reinforced ceramic materials

US7011786B2 · kind B2 · utility

Assignee

• SGL Carbon AG · DE

Inventors

• Moritz Bauer · Augsburg, DE
• Michael Heine · Meitingen, DE
• Andreas Kienzle · Thierhaupten, DE
• Ronald Huener · Adenau, DE
• Rainer Zimmermann-Chopin · Meitingen, DE
• Andreas Rahn · Wertingen, DE

Key dates

• Filing date: Dec 23, 2002
• Grant date: Mar 14, 2006
• Expiry date: Nov 3, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249928
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Process for producing shaped bodies comprising fiber-reinforced ceramic materials, where a green body is produced in a first step by introducing a press moulding composition into a mold, where the press moulding composition comprises carbon fibers and/or carbon filaments and pitch and/or resins which, when treated thermally and with the exclusion of oxidizing agents, form carbon-containing residues, the green body is cured in a second step by heating to a temperature of from 120° C. to 280° C. under pressure, the cured green body, also referred to as intermediate body, is carbonized in a third step by heating in a nonoxidizing atmosphere to a temperature of from about 750° C. to about 1100° C. to form a C/C body, wherein heating in the first, second and/or third step is at least partly effected by an electric current being passed through the pressable composition, the green body and/or the cured green body, shaped bodies produced according to this process and their use as brake disks, clutch disks and friction disks