Back to results
US 4,396,577 AGranted
Cobalt-palladium-silicon-boron brazing alloy
AssigneeGeneral Electric Company
InventorsMurray S. Smith, Jr., Mark S. Hilboldt, Pracheeshwar S. Mathur
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeGeneral Electric Company
InventorsMurray S. Smith, Jr., Mark S. Hilboldt, Pracheeshwar S. Mathur
Estimating the term…
A brazing alloy, particularly suited for use in high temperature gas turbine engines has a composition range which exhibits X-ray inspection capability, adequate stress rupture properties, ductility and oxidation resistance. The brazing alloy composition consists essentially of about 25-95% Pd, up to about 5% Si, up to about 3.5% B, balance being Co and incidental impurities, all percentages being by weight. The brazing alloy is capable of brazing in the 1800.degree.-2100.degree. F. temperature range and is less costly than current Au-bearing brazing alloys currently in use for brazing in this temperature range.
An improved brazing alloy consisting essentially of, by weight, 25-95% Pd, up to 5% Si, up to 3.5% B, balance being Co and incidental impurities, the Si, when selected, being at least about 2%, and the B, when selected, being at least about 0.5%, said brazing alloy having a liquidous temperature in the range of about 1800.degree.-2100.degree. F. and being characterized by the substantial absence of Ag, Ti, Mn, Cu, and P.
Dependencies are inferred from the claim text.