Metal fusion bonding – Process – Bonding nonmetals with metallic filler
Patent
1992-01-07
1993-08-10
Heinrich, Samuel M.
Metal fusion bonding
Process
Bonding nonmetals with metallic filler
2281221, 2281241, 228195, B23K 3102
Patent
active
052341526
ABSTRACT:
Ceramic and metal articles are joined using three metal layers one of which is a refractory metal or alloy. The refractory metal layer is placed between the other two layers, which each include a metal or alloy having a lower melting point than the refractory metal layer. The three metal layers are pressed between two articles to be bonded to form an assembly. The assembly is heated to a bonding temperature, at which the refractory metal layer remains solid, but the other two layers melt to form a liquid. The assembly is held at the bonding temperature. The refractory metal layer dissolves in surrounding liquid and a single solid bonding layer is eventually formed, at the bonding temperature, between the two articles. The bonding method may be referred to as a transient-liquid-phase or isothermal bonding method.
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Heinrich Samuel M.
Regents of the University of California
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