Method for repairing articles of ceramic composites
AssigneeGeneral Electric Company
InventorsAnteneh Kebbede, Milivoj Konstantin Brun, Krishan Lal Luthra, Henry Charles McGuigan
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Abstract
A method for repairing an article made of a fiber-reinforced ceramic matrix composite comprises attaching sections of a fiber-reinforced tape to the damaged area and then infiltrating the sections with the ceramic matrix or ceramic matrix precursor material. The material around the damaged area may be removed first to form a depression that is then filled with sections of the fiber-reinforced tape and further infiltrated with the ceramic matrix or ceramic matrix precursor material. The repaired article shows stress-strain curve similar to a defect-free article.
Claims36
A method for repairing a damaged area of an article that comprises a fiber-reinforced ceramic matrix composite (“CMC”) material, said method comprising:
- providing a repairing tape that comprises ceramic fibers and at least one matrix material selected from the group consisting of a ceramic matrix material, a ceramic matrix precursor material, and mixtures thereof;
- attaching at least a portion of said repairing tape to said damaged area of said article;
- providing an infiltrant phase material to said at least a portion of said repairing tape;
- said infiltrant phase material comprising a material selected from the group consisting of a ceramic matrix material, a ceramic matrix precursor material, and mixtures thereof;
- and
- infiltrating said at least a portion of said repairing tape with said infiltrant phase material.
A method for repairing a damaged area of an article that comprises a fiber-reinforced CMC material, said method comprising:
- providing a repairing tape that comprises ceramic fibers and at least one matrix material selected from the group consisting of a ceramic matrix material, a ceramic matrix precursor material, and mixtures thereof;
- removing a portion of said CMC material from said damaged area to form a depression in said article, said depression having a shape selected from the group consisting of an inverted cone, an inverted truncated cone, and a prism having a base on a surface of said article;
- filling said depression with a plurality of portions of said repairing tape;
- providing an infiltrant phase material to said portions of said repairing tape;
- said infiltrant phase material comprising at least a material selected from the group consisting of a ceramic matrix material, a ceramic matrix precursor material, and mixtures thereof;
- and
- infiltrating said portions of said repairing tape with said infiltrant phase material.
A method for repairing a damaged area of an article that comprises a fiber-reinforced CMC material, said method comprising:
- providing a repairing tape that comprises ceramic fibers and at least one matrix material selected from the group consisting of a ceramic matrix material, a ceramic matrix precursor material, and mixtures thereof;
- cleaning a portion of a surface of said article around said damaged area to provide a cleaned surface;
- attaching at least a portion of said repairing tape to said cleaned surface;
- providing an infiltrant phase material to said at least a portion of said repairing tape;
- said infiltrant phase material comprising at least a material selected from the group consisting of a ceramic matrix material, a ceramic matrix precursor material, and mixtures thereof;
- and
- infiltrating said at least a portion of said repairing tape with said infiltrant phase material.
Dependencies are inferred from the claim text.