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Title: 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):
9,579,722
Application Number:
14/596,307
Assignee:
U.S. Department of Energy
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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Works referenced in this record:

Analytical treatment of the role of surface oxide layers in the sintering of metals
journal, November 1979

  • Munir, Z. A.
  • Journal of Materials Science, Vol. 14, Issue 11, p. 2733-2740
  • DOI: 10.1007/BF00610647