Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1980-06-12
1982-09-21
Lieberman, Allan
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75204, 75208R, B22F 702
Patent
active
043505287
ABSTRACT:
A diffusion bonding method for assembling members formed from a liquid phase system material into a monolythic structure free of flaws and distortion. Member blanks are first formed from the material as by compacting or the like and then sintered to have their full density and hardness characteristics. Following sintering, any special surface or internal features are machined into the blanks to define the members. The members are also provided with bonding surfaces adapted to be placed in mating engagement with each other. The members are placed in an assembled relationship with the bonding surfaces engaging each other to define a bonding zone. In some cases, it may also be desirable to place a weight on the assembled members to continuously urge the bonding surfaces toward engagement. In the actual bonding step, the members are heated in a vacuum environment to a temperature intermediate the melting temperatures of the material low and high melting phase components. During such heating, the liquid phase system material of the two members coalesce across the boundary zone to effect an integral joint or bond.
REFERENCES:
patent: 3123471 (1964-03-01), Marshall
patent: 3551991 (1971-01-01), Reich et al.
patent: 4108652 (1978-08-01), Ogawa et al.
Blackhurst Daniel G.
Lieberman Allan
TRW Inc.
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