Method for the production of near net-shaped metallic and/or ceramic parts

US7351371B2 · kind B2 · utility

Assignee

• Forschungszentrum Jülich GmbH · DE

Inventors

• Heinz Nelles · Cagayan de Oro, PH
• Martin Bram · Emmelshausen, DE
• Hans Peter Buchkremer · Heinsberg, DE
• Detlev Stover · Niederzier, DE

Key dates

• Filing date: Sep 19, 2003
• Grant date: Apr 1, 2008
• Expiry date: Sep 23, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A porous near-net-shape metallic parts with an open porosity of at least 10% by volume is made by first forming an injectable mass of a metallic powder of stainless steel, Ti, NiTi, or a titanium alloy, at least one thermoplastic binder, and at least one place holder. The mass then injection molded into the shape of the part to be produced, cooled, set in a capillary-active material, and subjected to a first-stage binder removal to produce an open porosity. The place holder is then removed at least partially from the part with a fluid, and the part is subjected to a thermal binder-removing process. Finally the part is sintered.