Metal-ceramic formed body and process for producing it

US6573210B1 · kind B1 · utility

Assignee

• Nils Claussen · DE

Inventors

• Nils Claussen · Schwäbisch Hall, DE
• Silvia Schicker · Hamburg, DE
• Daniel Garcia · Swan Hills, CA
• Rolf Janssen · Hamburg, DE

Key dates

• Filing date: Nov 11, 1998
• Grant date: Jun 3, 2003
• Expiry date: Nov 11, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2201/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A composite ceramic-metal material has an Al2O3 matrix interpenetrated by a network of a ductile metal phase with a higher meltin temperature than aluminum and which makes up 15 to 80 vol. % of its total volume. The Al2O3 matrix forms a coherent network that makes up 20 to 85 vol. %, and the material contains 0.1 to 20 atom % aluminide. To produce this composite material, a green body shaped by powder metallurgy and which contains a finely divided powdery mixture of Al2O3 and optionally other ceramic substances, as well as one or several metals or metal alloys different from aluminum and to which 0.1 to 20 atom % aluminum are added, in relation to the metal proportion, is sintered. The composition is selected in such a way that maximum 15 vol. % aluminide phase can be formed in the finished sintered body.