Process for preparation of liquid phase bonded amorphous materia

Details Process for preparation of liquid phase bonded amorphous materia Process for preparation of liquid phase bonded amorphous materia

1984-03-05

1987-12-01

Czaja, Donald E.

Metal treatment

Compositions

Heat treating

148127, 148403, 228190, 228194, 228249, 419 35, C23C 1000

Patent

active

047102357

ABSTRACT:
A process for bonding together two or more pieces of material, at least one of which is an amorphous material, wherein an intermediate interlayer is placed between the two pieces and the assembly is hot pressed at a temperature above the melting point of the interlayer but below the crystallization temperature of the amorphous piece. The composition of the interlayer is chosen so that the elements diffusing into the pieces being bonded are compatible with retention of the amorphous structure. When the bonding operation is carried to completion, no evidence of the interlayer as a separate phase remains. Alternatively, the bonding operation may be halted before completion and the interlayer will remain as a separate, observable phase. For bonding hard metal amorphous materials, alloys of aluminum with silver, gold, silicon and germanium, and alloys of gold with silicon, with the addition of fluxing elements such as phosphorus and boron, have been found to provide particularly satisfactory results.

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