Environmental barrier coating material and coating structure...

Details Environmental barrier coating material and coating structure... Environmental barrier coating material and coating structure...

2006-11-21

2006-11-21

McNeil, Jennifer C. (Department: 1775)

Stock material or miscellaneous articles

Composite

Of silicon containing

C428S688000, C428S689000, C428S701000, C428S702000, C216S036000, C216S036000

Reexamination Certificate

active

07138183

ABSTRACT:
An environmental barrier coating material comprising one or more constituents selected from a group consisting of hafnia; hafnia stabilized by one or more rare-earth oxides and/or silica; zirconia-containing hafnia; and zirconia-containing hafnia stabilized by one or more rare-earth oxides and/or silica, which when formed as a coating structure for covering a substrate which has a low thermal expansion coefficient, has hafnon (HfSiO4) serving as a first layer directly formed on the substrate, and hafnia with which the first layer is coated as a second layer.

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