Title: Advanced high temperature environmental barrier coating for SiC/SiC ceramic matrix composites

Abstract

Advanced environmental barrier coating bond coat systems with higher temperature capabilities and environmental resistance are disclosed. These bond coat systems can be applied to ceramic substrates such as SiC/SiC ceramic matrix composite substrates, and can provide protection from extreme temperature, mechanical loading and environmental conditions, such as in high temperature gas turbines. Example bond coat systems can include either an advanced silicon/silicide component, an oxide/silicate component, or a combination thereof.

Inventors:

Zhu, Dongming; Hurst, Janet B.

Issue Date:

2020-03-31

Research Org.:

National Aeronautics and Space Administration (NASA), Washington, DC (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1637758

Patent Number(s):

10604454

Application Number:

15/625,277

Assignee:

The United States of America as represented by the Administrator of the National Aeronautics and Space Administration (Washington, DC)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B05 - SPRAYING OR ATOMISING IN GENERAL B05D - PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL

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

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B - PERFORMING OPERATIONS B05 - SPRAYING OR ATOMISING IN GENERAL B05D - PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL

B05D7/56 - {Three layers or more}

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

B32B18/00 - Layered products essentially comprising ceramics, e.g. refractory products

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2103/0021 - {Compounds of elements having a valency of 3}
C04B2111/00405 - {Materials with a gradually increasing or decreasing concentration of ingredients or property from one layer to another}
C04B2235/3224 - Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
C04B2235/3225 - Yttrium oxide or oxide-forming salts thereof
C04B2235/3418 - Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
C04B2235/75 - Products with a concentration gradient
C04B35/565 - based on silicon carbide
C04B35/80 - Fibres, filaments, whiskers, platelets, or the like {
C04B41/009 - {characterised by the material treated}
C04B41/5024 - {Silicates
C04B41/5042 - {Zirconium oxides or zirconates
C04B41/5044 - {Hafnates}
C04B41/5045 - {Rare-earth oxides}
C04B41/5071 - {Silicides}
C04B41/5096 - {Silicon
C04B41/52 - Multiple coating or impregnating {multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation}
C04B41/87 - Ceramics
C04B41/89 - for obtaining at least two superposed coatings having different compositions

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients

C08K2003/221 - {of rare earth metal}
C08K3/22 - of metals

C - CHEMISTRY C09 - DYES C09D - COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS

C09D1/00 - Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
C09D7/61 - inorganic

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

F01D5/288 - {Protective coatings for blades}

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

F05D2300/15 - Rare earth metals, i.e. Sc, Y, lanthanides
F05D2300/211 - Silica
F05D2300/2118 - Zirconium oxides
F05D2300/22 - Non-oxide ceramics
F05D2300/2261 - of silicon
F05D2300/6033 - Ceramic matrix composites [CMC]

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Resource Type:

Patent

Resource Relation:

Patent File Date: 06/16/2017

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE