Process for diffusion bonding

Abstract

Abstract A process for diffusion bonding of metal parts (including particles) by immersion of the metal parts, or at least those portions thereof to be joined together, in a non-metallic, inorganic melt while the parts are in intimate contact, heating them to a temperature at which diffusion of the metal atoms at the surfaces of one or more of the parts takes place, and maintaining said heating for a period of time sufficient to provide a satisfactory bond. The melt, which may consist of a molten glass, one or more molten oxides, or one or more fused salts, protects the metal surfaces from oxidation and in many cases serves as a flux to dissolve surface films from the metal parts. It may also serve concurrently as a heat-treating bath. Pressure can be applied to immersed metal parts to improve the intimacy of their contact and two or more parts, after heating in the melt, may be withdrawn and while coated with and protected by the melt may be pressed, rolled or otherwise mechanically treated to improve the inter-metal contact and then reimmersed in the melt for further heating.

Inventors

• 👤 W Wilson

Bibliographic Details