| 摘要 |
Superalloy jet engine components (10) with protective coatings (14, 84) That include additions of silicon and a dopant selected from yttrium, hafnium, and combinations thereof and a deposition process for forming such protective coatings (14, 84). A silicon-containing layer (30) may be applied to the superalloy substrate (12) of the component (10) before the aluminide coating (14) is formed with component (10) exposed to a vapor phase reactant containing the dopant. The aluminide coating (14), which contains dopant from the layer (30), may operate as a standalone environmental coating or as a bond coating for an optional ceramic thermal barrier layer (24). An optional zirconia layer (26) maybe provided between the aluminide coating (14) and the ceramic thermal barrier layer (24). Alternatively, the silicon-containing layer (30) may include the dopant before the aluminide coating (14) is formed and no vapor phase reactant containing the dopant is required. |
