Process for the production of composite components by powder injection molding, and composite powders suitable for this purpose

US6562290B2 · kind B2 · utility

Assignee

• H.C. STARCK INC. · US

Inventors

• Helmut Meinhardt · Laufenbürg, DE
• Bernd Meyer · Freiberg, DE
• Matthias Knüwer · Bremen, DE
• Dietmar Fister · Waldbröl, DE
• Wolfgang Wiezoreck · Laufenbürg, DE

Key dates

• Filing date: Aug 20, 2001
• Grant date: May 13, 2003
• Expiry date: Aug 20, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2999/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of metallic and metal-ceramic composite components by powder injection molding of a system comprising a metal composite powder, a binder and optionally a ceramic component, where the metal composite powder used is mixed with a protecting liquid in an inert atmosphere before the mixing with the binder. The invention furthermore relates to molybdenum/copper and tungsten/copper composite powders which have a primary metal particle size of predominantly <2 &mgr;m, an oxygen content of <0.8% by weight and optionally a ceramic component, to the use of these composite powders for the production of composite components by powder injection molding, and to a process for the preparation of composite powders in which oxides of molybdenum or tungsten and of copper are mixed, dry-ground and reduced using hydrogen at a temperature of from 800 to 1050&deg; C., and a ceramic component is optionally admixed with the resultant metal composite powder.