| 摘要 |
One or more embodiments relates to a method of producing an MCrAlY bond coat comprising an MCrAlY layer in contact with a Y—Al2O3 layer. The MCrAlY layer is comprised of a γ-M solid solution, a β-MAl intermetallic phase, and Y-type intermetallics. The Y—Al2O3 layer is comprised of Yttrium atoms coordinated with oxygen atoms comprising the Al2O3 lattice. The method comprises depositing an MCrAlY material on a substrate, applying an Y2O3 paste, and heating the substrate in a non-oxidizing atmosphere at a temperature between 400-1300° C. for a time sufficient to generate the Y—Al2O3 layer. Both the MCrAlY layer and the Y—Al2O3 layer have a substantial absence of Y2O3, YAG, and YAP phases. |
| 主权项 |
1. A method of producing a bond coat comprising:
depositing an MCrAlY material to a substrate surface of a substrate, where the MCrAlY material is comprised of chromium, aluminum, yttrium, and a base metal M, where the base metal M is Ni, Co, Fe, or combinations thereof, thereby generating an MCrAlY material surface, where the MCrAlY material surface is a surface of the MCrAlY material separated from the substrate surface by some portion of the MCrAlY material; applying a Y2O3 paste to the MCrAlY material surface, where the Y2O3 paste is comprised of Y2O3 and a halide activator, balance inert filler and inert transport fluid, and where the Y2O3 is at least 10 wt. % of the combined weight of the Y2O3, halide activator, and inert filler, and where the halide activator is at least about 0.1 wt. % of the combined weight of the Y2O3 and the halide activator, thereby generating a Y2O3 upper surface, where the Y2O3 upper surface is a surface of the Y2O3 paste separated from the MCrAlY material surface by some portion of the Y2O3 paste, and thereby forming a paste covered article; heating the paste covered article at a temperature of about 400° C. to about 1300° C. in a non-oxidizing atmosphere for a period of time, where the period of time is sufficient to generate an MCrAlY layer and a Y—Al2O3 layer, where the MCrAlY layer is comprised of γ-M solid solution, β-MAl intermetallic, and Y-type intermetallics, and the Y—Al2O3 layer is comprised of Yttrium atoms and Al2O3, where the Yttrium atoms are coordinated with oxygen atoms comprising the Al2O3, and where the Y—Al2O3 layer is in contact with the MCrAlY layer, thereby generating a heat treated article; and removing any remaining Y2O3 paste from the heat treated article, thereby generating a bond coated article, where the bond coated article is comprised of the bond coat. |
