Direct brazing of refractory metal features

Details Direct brazing of refractory metal features Direct brazing of refractory metal features

1997-10-30

2000-10-17

Ryan, Patrick

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

2282332, 2282628, B23K 119, B23K 2022, B23K 3102, B23K 3524

Patent

active

061317969

ABSTRACT:
A brazing method for the direct bonding of a metallic item to a refractory metal without the need for an adhesion layer. The direct brazing process uses a Cu--Ag--Ni alloy which eliminates the need for the steps of plating a refractory metal to be bonded to a metallic material with a nickel layer (or other nickel-containing adhesion layer) and diffusion annealing the plated refractory metal prior to brazing. The brazed joint produced by the direct brazing method between a refractory metal and a metallic item has a substantially reduced layer of nickel in the as-brazed joint which improves the mechanical properties of the joint.

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