Reinforced solder, brazing and welding compositions and methods

Details Reinforced solder, brazing and welding compositions and methods Reinforced solder, brazing and welding compositions and methods

1990-03-22

1992-07-07

Rosenberg, Peter D.

Metal treatment

Compositions

Fluxing

B23K 3534

Patent

active

051279690

ABSTRACT:
A solder, brazing or welding composition having improved physical properties, comprising a continuous phase ranging from about 40% to about 99% by volume of a solder, brazing or welding metal or alloy, and a disperse phase ranging from about 60% to about 1% by volume and comprising a reinforcing material in particulate or fibrous form, the reinforcing material being graphite, silicon carbide, a metal oxide, an elemental metal, and/or a metal alloy. A process for preparing the composite comprises providing a solder, brazing or welding metal or alloy, melting the metal or alloy, cooling the metal or alloy to a semi-solid state, subjecting the metal or alloy to vigorous shearing while in the semi-state, adding a reinforcing material as defined above to the metal or alloy during at least one of the cooling and shearing steps in an amount ranging from about 60% to about 1% by volume of the total volume, the reinforcing material being and remaining in particulate or fibrous form as a disperse phase, and solidifying the resulting composite. The composite may have a non-dendritic microstructure or may be amorphous.

REFERENCES:
patent: 2700091 (1955-01-01), Culbertson
patent: 3617396 (1971-11-01), Duff
patent: 4415950 (1983-11-01), Weeks et al.
patent: 4474323 (1984-10-01), Weeks et al.
patent: 4487638 (1984-11-01), Hoge
patent: 4625261 (1986-11-01), Weeks et al.
patent: 4699763 (1987-10-01), Sinharoy et al.
"Soldering & Brazing Products" J. W. Harris Co., Inc. 1989--p. 7.

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