Article having turbulation and method of providing turbulation on an article
AssigneeGeneral Electric Company
InventorsWayne Charles Hasz, Robert Alan Johnson, Ching-Pang Lee, Mark Gerard Rettig, Nesim Abuaf, John Howard Starkweather
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Abstract
An article includes turbulation material bonded to a surface of a substrate via a bonding agent, such as a braze alloy. In an embodiment, the turbulation material includes a particulate phase of discrete metal alloy particles having an average particle size within a range of about 125 microns to about 4000 microns. Other embodiments include methods for applying turbulation and articles for forming turbulation.
Claims37
A method of providing turbulation on a surface of a superalloy substrate, comprising the steps of:
- applying a layer on a surface of the superalloy substrate, the layer comprising braze alloy and turbulation material, wherein said turbulation material has an average particle size in the range from about 180 microns to about 4000 microns, and wherein said layer comprises a free-standing brazing sheet, said brazing sheet selected from the group consisting of
- a. a green braze tape comprising a braze alloy and a binder:
- and
- b. a braze metal foil, wherein said turbulation material is provided on a surface of said braze metal foil;
- and
- fusing the layer on the surface of the superalloy substrate, whereby the braze alloy melts and bonds the turbulation material to the superalloy substrate.
A method for providing turbulation on a surface of a metal substrate, comprising the steps of:
- providing a slurry on a surface of a metal substrate, the slurry comprising braze alloy and turbulation material, wherein the turbulation material has an average particle size within a range of about 180 microns to about 4000 microns;
- and
- fusing the trurbulation material to the substrate by melting said braze material wherein the turbulation material forms protuberances that extend beyond the surface of the substrate.
Dependencies are inferred from the claim text.