Circuit system, a composite material for use therein, and a meth

Details Circuit system, a composite material for use therein, and a meth Circuit system, a composite material for use therein, and a meth

1993-01-29

1994-05-10

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Heat and pressure simultaneously to effect sintering

419 31, 419 39, 419 44, 419 26, 419 60, 419 67, B22F 100, B22F 314

Patent

active

053105206

ABSTRACT:
Discrete powder particles of copper 14 and INVAR 12 are mixed together in a container 16 and packed into a powder metal article. This article is hot vacuum degassed and vacuum sealed and then heated to temperature well below the sintering temperature of copper or INVAR. Immediately after heating the article, it is subjected to a high pressure, high strain force such as extrusion through a die thereby yielding a fully dense, strong composite material 10 with excellent combined thermal expansion and conductivity properties.

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