Direct bonding of metals to ceramics and metals

Details Direct bonding of metals to ceramics and metals Direct bonding of metals to ceramics and metals

1975-07-30

1976-11-30

Smith, Al Lawrence

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

228903, B23K 3102

Patent

active

039944301

ABSTRACT:
Disclosed is a method of bonding metals to substrates such as ceramics or metals. A bonding agent forms a eutectic alloy with the metal to provide bonding. Several methods of supplying the bonding agent to the system are disclosed. However, regardless of which method of introducing the bonding agent into the system is employed, the quantity of the bonding agent is carefully controlled so that the compound in the region of the bond is hypoeutectic. To form the bond, the metal and the substrate are placed adjacent each other and the bonding agent is introduced into the system. The system is then heated to a temperature between the eutectic temperature and the melting point of the metal for a preselected time. The system is then cooled to form a bond. The heating is carried out in an inert atmosphere or a vacuum.

REFERENCES:
patent: 3911553 (1975-10-01), Burgess et al.

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