Eutectic brazing compositions, and related processes and devices
AssigneeGeneral Electric Company
InventorsRaghavendra Rao ADHARAPURAPU, Sundeep KUMAR
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Abstract
An active braze alloy composition is described, including nickel; or a combination of nickel and cobalt; about 2% by weight to about 30% by weight germanium; and about 1% by weight to about 5% by weight boron and about 0.5% by weight to about 5% by weight of at least active element. The composition is free of silicon. Braze alloy joints formed of the braze alloy composition, and located in various devices, structures, and machines, are also described. A related method for repairing a crack or other cavity within a metal component, using the braze composition, is further described.
Claims20
A braze alloy composition, comprising:
- nickel, or a combination of nickel and cobalt;
- about 2% by weight to about 30% by weight germanium;
- and
- about 1% by weight to about 5% by weight boron;
- wherein the composition is free of silicon.
A method for repairing a crack or other cavity within a metal component, wherein the crack or cavity includes surfaces that contain oxide material, comprising the step of filling or partially filling the crack or cavity with a braze composition in its liquidus state, and then letting the braze material solidify, thereby sealing the crack or cavity, in part by bonding the metallic material of the component with the oxide material on the crack- or cavity-surfaces,
- wherein the braze alloy composition comprises:
- nickel or a combination of nickel and cobalt;
- about 2% by weight to about 30% by weight germanium;
- about 1% by weight to about 5% by weight boron;
- and
- about 0.51% by weight to about 5% by weight of at least one active metal element;
- wherein the braze composition is free of silicon.
Dependencies are inferred from the claim text.