Method for cold bonding

Details Method for cold bonding Method for cold bonding

1987-08-28

1989-02-14

Rowan, Kurt

Metal fusion bonding

Process

Using only pressure

228116, 228208, B23K 2100

Patent

active

048041327

ABSTRACT:
The present invention is a method for bonding two surfaces without applying heat. The surfaces are prepared so that they both have an outermost layer of aluminum. One of the surfaces has metallized particles that protrude at the desired bonding points. When the two surfaces are brought into contact, the particles pierce the aluminum surface, displacing any aluminum oxide that may be present. This provides two virgin aluminum surfaces on contact with each other, which allows the formation of a metal matrix, thus bonding the two surfaces. The strength of the bond can be controlled by varying the piercing depth and size of the particles. The material for the particles may be chosen so that the bond is both electrically and thermally conductive, either electrically or thermally conductive, or both electrically and thermally insulative.

REFERENCES:
patent: 3100933 (1963-08-01), Hancock et al.
patent: 3203083 (1965-08-01), Obenhaus
patent: 3482726 (1969-12-01), Schroeder, Jr.
patent: 3555664 (1971-01-01), Bingham et al.
patent: 3921885 (1975-11-01), Knox

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