Title: MCrAlY bond coat with enhanced Yttrium layer

Abstract

One or more embodiments relates to an MCrAlY bond coat comprising an MCrAlY layer in contact with a Y--Al.sub.2O.sub.3 layer. The MCrAlY layer is comprised of a .gamma.-M solid solution, a .beta.-MAl intermetallic phase, and Y-type intermetallics. The Y--Al.sub.2O.sub.3 layer is comprised of Yttrium atoms coordinated with oxygen atoms comprising the Al.sub.2O.sub.3 lattice. Both the MCrAlY layer and the Y--Al.sub.2O.sub.3 layer have a substantial absence of Y--Al oxides, providing advantage in the maintainability of the Yttrium reservoir within the MCrAlY bulk. The MCrAlY bond coat may be fabricated through application of a Y.sub.2O.sub.3 paste to an MCrAlY material, followed by heating in a non-oxidizing environment.

Inventors:

Jablonski, Paul D.; Hawk, Jeffrey A.

Issue Date:

2015-04-21

Research Org.:

National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1178259

Patent Number(s):

9012032

Application Number:

14/065,726

Assignee:

U.S. Department of Energy (Washington, DC)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL

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B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

B32B15/04 - comprising metal as the main or only constituent of a layer, {which is next to another layer of the same or of a different material
B32B15/18 - comprising iron or steel {
B32B15/20 - comprising aluminium or copper {

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL

C23C14/083 - {of refractory metals or yttrium}
C23C16/405 - {of refractory metals or yttrium}
C23C28/022 - {with at least one MCrAlX layer}
C23C28/042 - {including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides}
C23C30/005 - {on hard metal substrates}
C23C4/073 - containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
C23C4/18 - After-treatment

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

F01D5/28 - Selecting particular materials
F01D5/288 - {Protective coatings for blades}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/12611 - Oxide-containing component
Y10T428/12618 - Plural oxides
Y10T428/1266 - O, S, or organic compound in metal component
Y10T428/12937 - Co- or Ni-base component next to Fe-base component
Y10T428/12944 - Ni-base component
Y10T428/12951 - Fe-base component
Y10T428/12979 - Containing more than 10% nonferrous elements [e.g., high alloy, stainless]
Y10T428/264 - Up to 3 mils
Y10T428/265 - 1 mil or less

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Resource Type:

Patent

Resource Relation:

Patent File Date: 2013 Oct 29

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE