Powdered metal composite material and starting material and method for producing such a composite material

US6756118B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wilfried Aichele · Winnenden, DE
• Hans-Peter Koch · Stuttgart, DE
• Andreas Harzer · Schwieberdingen, DE

Key dates

• Filing date: Feb 28, 2002
• Grant date: Jun 29, 2004
• Expiry date: Feb 28, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2993
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In order to state a powdered metal composite material having a high specific electrical resistance and having good mechanical strength, very good resistance to temperature and to fuel, and a starting material and a method for the economical production of such a composite material, a powdered metal composite material having a high specific electrical resistance, which contains at least two oxides encapsulating the powdered metal particles, the oxides forming at least one common phase, and a starting material containing a powdered metal, which contains at least two antitack agents having oxidic pyrolysis residue and oxidic fine powder, and a method for producing such a composite material are made available, which relate to a starting material of the kind named, in which the starting material is pressed to form molded articles, in which the antitack agents are pyrolyzed in a nonreducing atmosphere to form oxides, and the oxides then present are made to react with one another to form at least one common phase.