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Title: Protective aluminum oxide surface coatings and low-temperature forming process for high-temperature applications

Abstract

A method of both coating a substrate with aluminum oxide and infusing the substrate with elemental aluminum is disclosed. In one example, the method includes providing a metal powder/polymer binder slurry, the slurry having a solvent, an organic binder, metal granules and a seed element, wherein the metal granules include Al; dispersing the slurry upon a Cr-containing surface; after dispersing the slurry, exposing the slurry to air and maintaining the temperature of the slurry and substrate below 110° C. to remove at least a portion of the solvent from the slurry; and, in a combined step, both exposing the binder, metal granules and substrate to air and heating the remaining slurry and substrate at a temperature less than or equal to 1000° C. to both diffuse at least a portion of the metal of the metal granules into the substrate and coat the substrate with aluminum oxide.

Inventors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1632629
Patent Number(s):
10,577,694
Application Number:
15/867,370
Assignee:
Battelle Memorial Institute (Richland, WA)
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Patent
Resource Relation:
Patent File Date: 01/10/2018
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Choi, Jung-Pyung, and Stevenson, Jeffry W. Protective aluminum oxide surface coatings and low-temperature forming process for high-temperature applications. United States: N. p., 2020. Web.
Choi, Jung-Pyung, & Stevenson, Jeffry W. Protective aluminum oxide surface coatings and low-temperature forming process for high-temperature applications. United States.
Choi, Jung-Pyung, and Stevenson, Jeffry W. Tue . "Protective aluminum oxide surface coatings and low-temperature forming process for high-temperature applications". United States. https://www.osti.gov/servlets/purl/1632629.
@article{osti_1632629,
title = {Protective aluminum oxide surface coatings and low-temperature forming process for high-temperature applications},
author = {Choi, Jung-Pyung and Stevenson, Jeffry W.},
abstractNote = {A method of both coating a substrate with aluminum oxide and infusing the substrate with elemental aluminum is disclosed. In one example, the method includes providing a metal powder/polymer binder slurry, the slurry having a solvent, an organic binder, metal granules and a seed element, wherein the metal granules include Al; dispersing the slurry upon a Cr-containing surface; after dispersing the slurry, exposing the slurry to air and maintaining the temperature of the slurry and substrate below 110° C. to remove at least a portion of the solvent from the slurry; and, in a combined step, both exposing the binder, metal granules and substrate to air and heating the remaining slurry and substrate at a temperature less than or equal to 1000° C. to both diffuse at least a portion of the metal of the metal granules into the substrate and coat the substrate with aluminum oxide.},
doi = {},
url = {https://www.osti.gov/biblio/1632629}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {3}
}

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Works referenced in this record:

Slurry compositions for diffusion coatings
patent, September 2002


Stainless steel member and method of manufacturing stainless steel member
patent, March 1995


Method of forming aluminum coating layer on ferrous base alloy workpiece
patent, October 1980


Oxidation resistant ferrous base foil and method therefor
patent, March 1988