Repair of a silicon-based bondcoat
AssigneeGeneral Electric Company
InventorJulin Wan
Life of this patent
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Abstract
Methods are provided for repairing a defect on a silicon-containing substrate. The method may include applying a powder mixture into the defect of an existing coating on a surface of the silicon-containing substrate, wherein the powder mixture comprises silicon and germanium at a Ge mole fraction of 0.01 to 0.3; and heat treating the powder mixture within the defect at a sintering temperature that is 1150° C. to 1400° C. to form a repaired bondcoat within the defect. Repaired components are also provided that include a repaired bondcoat formed within the defect on the silicon-containing substrate, wherein the repaired bondcoat comprises a silicon-germanium phase comprising a Ge mole fraction of germanium of 0.01 to 0.3 and a Si mole fraction of silicon of 0.7 to 0.99.
Claims18
A method of repairing a defect on a silicon-containing substrate, the method comprising:
- applying a powder mixture into the defect of an existing coating on a surface of the silicon-containing substrate, wherein the powder mixture comprises a silicon-based powder and a germanium-based powder, wherein the powder mixture comprises germanium at a Ge mole fraction of 0.01 to 0.3;
- and
- heat treating the powder mixture within the defect at a sintering temperature that is 1150° C. to 1400° C. to form a repaired bondcoat within the defect.
A method of repairing a defect on a silicon-containing substrate, the method comprising:
- applying a powder mixture into the defect of an existing coating on a surface of the silicon-containing substrate, wherein the powder mixture comprises silicon and germanium, wherein the powder mixture comprises germanium at a Ge mole fraction of 0.01 to 0.3, wherein the powder mixture comprises a plurality of core-shell particles having a core surrounded by a shell, wherein the core comprises a silicon-based material, and wherein the shell comprises a germanium-based material;
- and
- heat treating the powder mixture within the defect at a sintering temperature that is 1150° C. to 1400° C. to form a repaired bondcoat within the defect.
A method of repairing a defect on a silicon-containing substrate, the method comprising:
- applying a powder mixture into the defect of an existing coating on a surface of the silicon-containing substrate, wherein the powder mixture comprises a silicon-based powder and a germanium-based powder, wherein the powder mixture comprises germanium at a Ge mole fraction of 0.01 to 0.3, wherein the powder mixture is substantially free from a sintering aid;
- and
- heat treating the powder mixture within the defect at a sintering temperature that is 1150° C. to 1400° C. to form a repaired bondcoat within the defect.
A method of repairing a defect on a silicon-containing substrate, the method comprising:
- applying a powder mixture into the defect of an existing coating on a surface of the silicon-containing substrate, wherein the powder mixture comprises silicon and germanium, wherein the powder mixture comprises germanium at a Ge mole fraction of 0.01 to 0.3, wherein the powder mixture is applied as a dry pack that is substantially free from a carrier fluid;
- and
- heat treating the powder mixture within the defect at a sintering temperature that is 1150° C. to 1400° C. to form a repaired bondcoat within the defect.
A method of repairing a defect on a silicon-containing substrate, the method comprising:
- applying a powder mixture into the defect in a surface of the silicon-containing substrate, wherein the powder mixture comprises silicon and germanium, wherein the powder mixture comprises germanium at a Ge mole fraction of 0.01 to 0.3, and wherein the germanium in the powder mixture is pure germanium, a germanium-based alloy having at least 90% by weight germanium, or a combination thereof;
- and
- heat treating the powder mixture within the defect at a sintering temperature that is 1150° C. to 1400° C. to form a repaired substrate within the defect.
Dependencies are inferred from the claim text.