Environmental barrier coatings that give the CMAS reduction performance for the ceramic substrate components

摘要

Environmental barrier coating having CMAS reduced capability for components containing silicon. In one embodiment, environmental barrier coating includes aluminide - a bond coat layer comprising alumina _{TGO, AeAl 2 O 19, AeHfO} 3, AeZrO 3, ZnAl 2 O 4, MgAl 2 O 4, Ln 4 Al 2 O 9, Lna _{4 Ga 2 O 9, Ln 3} Al 5 O 12, Ln 3 Ga 5 O 12, Ga 2 O 3, comprises an outer layer selected from the group consisting of HfO ₂ and _LnPO 4. .FIELD 1