General Electric Company

Dennis William Cavanaugh

David Vincent Bucci

Canan Uslu Hardwicke

Ganjiang Feng

David Andrew Helmick

Srikanth Chandrudu Kottilingam

Yan Cui

Brian Lee Tollison

Dechao Lin

Surinder Singh Pabla

George Albert Goller

Mark Lawrence Hunt

Daniel James Dorriety

Stephen Gerard Pope

Eric Eicher McConnell

Nuo Sheng

John Gregory Obeirne

Todd Moran

Matthew James O'Connell

Matthew James OConnell

Vinod P Pareek

Todd Steven Moran

A process of treating a coated article and a treated article are disclosed. The process includes providing an article having a MCrAlY coating, applying an aluminide treatment onto the MCrAlY coating to form a treated MCrAlY coating, and outwardly forming &#x3b2;-phase material from the MCrAlY coating into the treatment. The applying is selected from the group consisting of soaking, spraying, brushing, dipping, pouring, pack cementation, vapor deposition, and combinations thereof. The treated article includes a substrate and a treated MCrAlY coating positioned on at least a portion of the substrate. The treated MCrAlY coating includes a &#x3b2;-phase aluminide in a spray-applied, brush-applied, pour-applied, dip-applied, pack cement-applied, vapor deposit-applied, or soaking-applied treatment.

Treated coated article and process of treating a coated article

In one embodiment, a method for forming an article with a diffusion portion comprises: forming a slurry comprising chromium and silicon, applying the slurry to the article, and heating the article to a sufficient temperature and for a sufficient period of time to diffuse chromium and silicon into the article and form a diffusion portion comprising silicon and a microstructure comprising &#x3b1;-chromium. In one embodiment, a gas turbine component comprises: a superalloy and a diffusion portion having a depth of less than or equal to 60 &#x3bc;m measured from the superalloy surface into the gas turbine component. The diffusion portion has a diffusion surface having a microstructure comprising greater than or equal to 40% by volume &#x3b1;-chromium.

Process for forming a chromium diffusion portion and articles made therefrom

Methods of reducing an initial cross-sectional area of a hole in a component to a predetermined cross-sectional area including preparing a composition comprising at least an aluminum alloy with a melting temperature higher than aluminum, applying the composition to an interior surface of the hole, and then heating the component to cause a metal within the component to diffuse from the component into the composition and react with the aluminum alloy in the composition to form a coating on the interior surface of the hole. The heating step is performed to selectively modify the initial cross-sectional area of the hole and thereby directly attain the predetermined cross-sectional area thereof.

Methods of resizing holes

A method for making a cellular seal member for a turbine is disclosed. The method includes, in sequence, forming a diffusion aluminide coating on a surface of a cellular seal to form a coated cellular seal. The method also includes brazing the coated cellular seal to a seal substrate.

Method for making a cellular seal

A slurry and slurry coating process for forming a diffusion aluminide coating on a substrate, including internal surfaces within the substrate. The process involves preparing a slurry of a powder containing a metallic aluminum alloy having a melting temperature higher than aluminum, an activator capable of forming a reactive halide vapor with the metallic aluminum, and a binder containing an organic polymer. The slurry is applied to surfaces of the substrate, which is then heated to burn off the binder, vaporize and react the activator with the metallic aluminum to form the halide vapor, react the halide vapor at the substrate surfaces to deposit aluminum on the surfaces, and diffuse the deposited aluminum into the surfaces to form a diffusion aluminide coating. The process can be tailored to selectively produce an inward or outward-type coating. The binder burns off to form an ash residue that can be readily removed.

Slurry diffusion aluminide coating composition and process

A casting process for producing metal alloy castings, facecoats and apparatuses suitable for carrying out the process, and castings produced by the process. The casting process entails the use of a mold having a cavity with a continuous aluminum-containing solid facecoat on its surface. A molten quantity of a metal alloy is introduced into the mold cavity so that the molten alloy contacts the solid facecoat. The mold is then allowed to cool to solidify the molten alloy and form a cast product. During the casting process, aluminum in the solid facecoat diffuses into the cast product to form an aluminum-containing surface region at the casting surface. Following removal of the cast product from the mold, an alumina-containing scale grows on the casting surface as a result of oxidation of the casting surface region.

Casting process, materials and apparatus, and castings produced therewith

A method and composition are provided for coating honeycomb seals and, more specifically, to a method and slurry for applying an aluminide coating onto honeycomb seals. The method includes preparing a slurry of a powder containing a metallic aluminum alloy having a melting temperature higher than aluminum, an activator capable of forming a reactive halide vapor with the metallic aluminum, and a binder containing an organic polymer. The slurry is applied to surfaces of the honeycomb seal, which is then heated to remove or burn off the binder, vaporize and react the activator with the metallic aluminum to form the halide vapor, react the halide vapor at the substrate surfaces to deposit aluminum on the surfaces of the seal, and diffuse the deposited aluminum into the surfaces to form a diffusion aluminide coating.

Method for coating honeycomb seal using a slurry containing aluminum

Growing community of inventors

Simpsonville, SC, United States of America

Dennis William Cavanaugh