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Thermal/environmental barrier coating with transition layer for silicon comprising materials
An article (10) comprising a substrate (12) formed of a silicon-comprising material, such as an article (10) exposed to the hostile thermal environment of a gas turbine engine. The article (10) further comprises an environmental barrier layer (16), e.g., an alkaline earth metal aluminosilicate, and a top coat comprising zirconia or hafnia stabilized with up to about 10 mole % of an oxide of a metal selected from the group consisting of magnesium, calcium, scandium, yttrium, and lanthanide metals, and mixtures thereof. The article (10) further comprises a transition layer (20) between the environmental barrier layer (16) and the top coat (18), the transition layer (20) comprising zirconia or hafnia stabilized with up to about 10 mole % of an oxide of a metal selected from the group consisting of magnesium, calcium, scandium, yttrium, and lanthanide metals; and a low CTE oxide selected from the group consisting of niobia and tantala; and mixtures thereof. A method for preparing a thermal/environmental barrier coating system (14) on a substrate (12) formed of a silicon-comprising material is also disclosed.
Thermal/environmental barrier coating with transition layer for silicon comprising materials
An article (10) comprising a substrate (12) formed of a silicon-comprising material, such as an article (10) exposed to the hostile thermal environment of a gas turbine engine. The article (10) further comprises an environmental barrier layer (16), e.g., an alkaline earth metal aluminosilicate, and a top coat comprising zirconia or hafnia stabilized with up to about 10 mole % of an oxide of a metal selected from the group consisting of magnesium, calcium, scandium, yttrium, and lanthanide metals, and mixtures thereof. The article (10) further comprises a transition layer (20) between the environmental barrier layer (16) and the top coat (18), the transition layer (20) comprising zirconia or hafnia stabilized with up to about 10 mole % of an oxide of a metal selected from the group consisting of magnesium, calcium, scandium, yttrium, and lanthanide metals; and a low CTE oxide selected from the group consisting of niobia and tantala; and mixtures thereof. A method for preparing a thermal/environmental barrier coating system (14) on a substrate (12) formed of a silicon-comprising material is also disclosed.
Thermal/environmental barrier coating with transition layer for silicon comprising materials
Wärmedämmschicht für siliziumhaltiges Substrat
Couche barrière thermique/environnementale pour un substrat contenant du silicium
SPITSBERG IRENE (author) / GOVERN CHRISTINE (author) / NAGARAJ BANGALORE ASWATHA (author) / HAZEL BRIAN THOMAS (author) / MITCHELL DAVID JOSEPH (author)
2016-06-01
Patent
Electronic Resource
English
Thermal/Environmental barrier coating system for silicon-containing materials
| European Patent Office | 2018