Environmental barrier coating

Details Environmental barrier coating Environmental barrier coating

2005-01-18

2005-01-18

McNeil, Jennifer (Department: 1775)

Stock material or miscellaneous articles

Composite

Of silicon containing

C428S448000, C428S697000, C428S699000, C428S701000, C428S702000, C427S255190, C427S427000, C416S24100B

Reexamination Certificate

active

06844075

ABSTRACT:
A coating for a silicon based material such as those used in high temperature environments. An aspect of the invention is directed to an environmental barrier coating including a silicon bond coat, and intermediate coat, and a top coat. The intermediate coat may comprise tantalum aluminate, niobium aluminate, or a mixture of the two. The intermediate coat is resistant to solid-state suburface reactions with the bond coat and the top coat and is substantially inert to reactions with silica at high temperatures.

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