ARTICLE FOR HIGH TEMPERATURE SERVICE

摘要

Articles for use at high temperatures, for example as gas turbine engine components, are described. The article includes a substrate and a coating disposed over the substrate. The coating includes a silicate phase that has a composition in accordance with the formula (A(1-x)Dx)2Si2O7, where x is a number at least 0.03 and up to 1; wherein A includes yttrium and D includes a Group 13 element, such as indium, gallium, and/or aluminum. Various combinations of other coatings may be included with the silicate-containing coating to enhance protection.

主权项

1. An article comprising:
a substrate; and a coating disposed over the substrate, wherein the coating comprises a silicate phase, the silicate phase having a composition in accordance with the formula
(A(1-x)Dx)2Si2O7, where x is a number at least 0.03 and up to 1; wherein A comprises yttrium and D comprises a Group 13 element.