Friction disc and process for producing the same

US7219776B2 · kind B2 · utility

Assignee

• AUDI AG · DE

Inventors

• Moritz Bauer · Augsburg, DE
• Bodo Benitsch · Buttenwiesen, DE
• Martin Christ · Osterode, DE
• Udo Gruber · Neusäß, DE
• Michael Heine · Meitingen, DE
• Andreas Kienzle · Thierhaupten, DE
• Jens Rosenlocher · Augsburg, DE
• Rainer Zimmermann-Chopin · Meitingen, DE

Key dates

• Filing date: Apr 18, 2002
• Grant date: May 22, 2007
• Expiry date: May 16, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2200/006
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A friction disc, in particular a brake or clutch disc, includes carbon fiber-reinforced ceramic composite material with at least one top surface formed as a friction surface. At least part of the friction surface is formed of a different material, in particular of a carbon-containing material. The different material exhibits lower wear and oxidation resistance than that of the rest of the friction surface and a supporting zone of the friction disc. A visual, audible or mechanical signal is produced under operating conditions due to comparatively greater wear. The signal provides a warning that the service life of the friction disc is being exceeded. A process for producing the friction disc is also provided.