Method of making an apparatus for transpiration cooling of substrates such as turbine airfoils
Abstract
A method and apparatus for generating transpiration cooling using an oxidized porous HTA layer metallurgically bonded to a substrate having micro-channel architectures. The method and apparatus generates a porous HTA layer by spreading generally spherical HTA powder particles on a substrate, partially sintering under O.sub.2 vacuum until the porous HTA layer exhibits a porosity between 20% and 50% and a neck size ratio between 0.1 and 0.5, followed by a controlled oxidation generating an oxidation layer of alumina, chromia, or silica at a thickness of about 20 to about 500 nm. In particular embodiments, the oxidized porous HTA layer and the substrate comprise Ni as a majority element. In other embodiments, the oxidized porous HTA layer and the substrate further comprise Al, and in additional embodiments, the oxidized porous HTA layer and the substrate comprise .gamma.-Ni+.gamma.'-Ni.sub.3Al.
- Inventors:
- Issue Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1345391
- Patent Number(s):
- 9579722
- Application Number:
- 14/596,307
- Assignee:
- U.S. Department of Energy
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
- DOE Contract Number:
- AC02-07CH11358
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2015 Jan 14
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 36 MATERIALS SCIENCE
Citation Formats
Alvin, Mary Anne, Anderson, Iver, Heidlof, Andy, White, Emma, and McMordie, Bruce. Method of making an apparatus for transpiration cooling of substrates such as turbine airfoils. United States: N. p., 2017.
Web.
Alvin, Mary Anne, Anderson, Iver, Heidlof, Andy, White, Emma, & McMordie, Bruce. Method of making an apparatus for transpiration cooling of substrates such as turbine airfoils. United States.
Alvin, Mary Anne, Anderson, Iver, Heidlof, Andy, White, Emma, and McMordie, Bruce. Tue .
"Method of making an apparatus for transpiration cooling of substrates such as turbine airfoils". United States. https://www.osti.gov/servlets/purl/1345391.
@article{osti_1345391,
title = {Method of making an apparatus for transpiration cooling of substrates such as turbine airfoils},
author = {Alvin, Mary Anne and Anderson, Iver and Heidlof, Andy and White, Emma and McMordie, Bruce},
abstractNote = {A method and apparatus for generating transpiration cooling using an oxidized porous HTA layer metallurgically bonded to a substrate having micro-channel architectures. The method and apparatus generates a porous HTA layer by spreading generally spherical HTA powder particles on a substrate, partially sintering under O.sub.2 vacuum until the porous HTA layer exhibits a porosity between 20% and 50% and a neck size ratio between 0.1 and 0.5, followed by a controlled oxidation generating an oxidation layer of alumina, chromia, or silica at a thickness of about 20 to about 500 nm. In particular embodiments, the oxidized porous HTA layer and the substrate comprise Ni as a majority element. In other embodiments, the oxidized porous HTA layer and the substrate further comprise Al, and in additional embodiments, the oxidized porous HTA layer and the substrate comprise .gamma.-Ni+.gamma.'-Ni.sub.3Al.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {2}
}
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