A method for forming a coating on a surface of an airfoil is provided, where the airfoil has a leading edge, a trailing edge, a pressure side, and a suction side. The method can include forming a platinum-group metal layer on the surface of the airfoil along at least a portion of the trailing edge, and forming an aluminide coating over the surface of the airfoil of the leading edge, the trailing edge, the pressure side, and the suction side. The leading edge may be substantially free from any platinum-group metal. The method may further include, prior to forming the aluminide coating, forming a bond coating on the surface of the airfoil along the leading edge, and after forming the aluminide coating, forming a thermal barrier coating over the bond coating. A method is also generally provided for repairing a coating on a surface of an airfoil.

This method is a method for manufacturing a gas turbine blade, including: producing a gas turbine blade having a cooling pass inside thereof; and partially coating an inner surface of the cooling pass with Al. The step of partially coating an inner surface of the cooling pass with Al further including: a first step of specifying a temperature range which satisfies both of oxidation resistance and fatigue strength and the temperature distribution of the inner surface of the cooling pass based on an examination result or result of a numerical analysis; a second step of setting an Al-coating-applying portion of the inner surface of the cooling pass as the temperature range specified at the first step; and a third step of applying Al coating only into the set Al-coating-applying portion.

This method is a method for manufacturing a gas turbine blade, including: producing a gas turbine blade having a cooling pass inside thereof; and partially coating an inner surface of the cooling pass with Al. The step of partially coating an inner surface of the cooling pass with Al further including: a first step of specifying a temperature range which satisfies both of oxidation resistance and fatigue strength and the temperature distribution of the inner surface of the cooling pass based on an examination result or result of a numerical analysis; a second step of setting an Al-coating-applying portion of the inner surface of the cooling pass as the temperature range specified at the first step; and a third step of applying Al coating only into the set Al-coating-applying portion.

Methods are provided for coating a component. In one such method, the component is disposed with metal alloy gravel comprising aluminum. An aluminide coating is then formed on the component, where the aluminum from the metal alloy gravel diffuses into the component to form the aluminide coating.

Methods are provided for coating a component. In one such method, the component is disposed with metal alloy gravel comprising aluminum. An aluminide coating is then formed on the component, where the aluminum from the metal alloy gravel diffuses into the component to form the aluminide coating.

A method for applying an aluminide coating includes applying an aluminum-based slurry onto an elongated member. The elongate member is introduced through an opening of a component and positioned within a cavity of the component at a location that is spaced apart from the internal surfaces of the component. Heat is applied to generate vaporized aluminum which diffuses into the internal surfaces of the component. Aluminum reacts with the internal surfaces to form an aluminide coating.

A method for applying an aluminide coating includes applying an aluminum-based slurry onto an elongated member. The elongate member is introduced through an opening of a component and positioned within a cavity of the component at a location that is spaced apart from the internal surfaces of the component. Heat is applied to generate vaporized aluminum which diffuses into the internal surfaces of the component. Aluminum reacts with the internal surfaces to form an aluminide coating.

A sliding component having a wear-resistant coating includes a sliding component formed of a Ni alloy, and a wear-resistant coating provided on a sliding surface of the sliding component. The wear-resistant coating has, at least on the surface side thereof, an Al-containing Co alloy layer which contains Co as a main component, at least one of W, Ni, Mo, Fe, Si, and C, Cr, and 0.3% by mass or more and 26% by mass or less of Al.

The present invention provides a preparation method of a zirconium-titanium-based alloy embedded aluminized layer, and relates to the technical field of metal surface modification. The preparation method provided by the invention comprises the following steps: putting a zirconium-titanium-based alloy and an aluminiferous penetrant into a mould from bottom to top in the sequence of a first penetrant layer, a first zirconium-titanium-based alloy, a second penetrant layer, a second zirconium-titanium-based alloy and a third penetrant layer, and compacting to obtain a mixed sample; sequentially covering the surface of the mixed sample with activated carbon powder and alkali metal halide, and then sequentially carrying out heat treatment and cooling to obtain a zirconium-titanium-based alloy embedded aluminized layer. The preparation method provided by the invention does not need to adopt a special heating furnace or carry out heat treatment under a vacuum condition in the actual application process, simplifies the operation process and the operation condition, has small technical difficulty and small equipment investment, and is suitable for large-scale production and application.

The present invention provides a preparation method of a zirconium-titanium-based alloy embedded aluminized layer, and relates to the technical field of metal surface modification. The preparation method provided by the invention comprises the following steps: putting a zirconium-titanium-based alloy and an aluminiferous penetrant into a mould from bottom to top in the sequence of a first penetrant layer, a first zirconium-titanium-based alloy, a second penetrant layer, a second zirconium-titanium-based alloy and a third penetrant layer, and compacting to obtain a mixed sample; sequentially covering the surface of the mixed sample with activated carbon powder and alkali metal halide, and then sequentially carrying out heat treatment and cooling to obtain a zirconium-titanium-based alloy embedded aluminized layer. The preparation method provided by the invention does not need to adopt a special heating furnace or carry out heat treatment under a vacuum condition in the actual application process, simplifies the operation process and the operation condition, has small technical difficulty and small equipment investment, and is suitable for large-scale production and application.