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    • 9. 发明授权
    • Environmental coating for nickel aluminide components and a method
therefor
    • 镍铝化合物组分的环境涂料及其制备方法
    • US5837385A
    • 1998-11-17
    • US829295
    • 1997-03-31
    • Jon C. SchaefferDavid F. Lahrman
    • Jon C. SchaefferDavid F. Lahrman
    • C23C4/02C23C28/00F01D5/28B32B15/04C23C10/28C23C10/60
    • F01D5/288C23C28/00C23C4/02Y10T428/12458Y10T428/1259Y10T428/12944
    • An environmental coating and a method for forming the coating on a nickel aluminide component designed for use in a hostile thermal environment, such as turbine, combustor and augmentor components of a gas turbine engine. The environmental coating includes a metal that has been diffused into the surface of the nickel aluminide component, and an aluminum oxide layer on the surface of the nickel aluminide component. According to this invention, the metal is one or more noble metals, chromium and/or an MCr alloy, and forms a diffusion region comprising noble metal-aluminides and/or chromium-aluminides. The environmental coating optionally contains up to about 1.0 atomic percent of at least one oxygen-active element, such as yttrium, hafnium, zirconium and/or cerium. According to the invention, the environmental coating need only consist of the diffusion region and the aluminum oxide layer, and therefore does not require additional environmentally-resistant layers (e.g., diffusion aluminides or MCrAlY coatings) to protect the underlying nickel aluminide substrate.
    • 一种环境涂层和一种在设计用于恶劣热环境的镍铝化合物组分上形成涂层的方法,例如燃气涡轮发动机的涡轮机,燃烧器和增压器部件。 环境涂层包括已经扩散到铝酸镍组分的表面中的金属和在铝化镍组分的表面上的氧化铝层。 根据本发明,金属是一种或多种贵金属,铬和/或MCr合金,并形成包含贵金属铝化物和/或铬铝化物的扩散区。 环境涂层任选地含有至多约1.0原子%的至少一种氧活性元素,例如钇,铪,锆和/或铈。 根据本发明,环境涂层仅需要由扩散区域和氧化铝层组成,因此不需要额外的耐环境层(例如扩散铝化物或MCrAlY涂层)来保护下面的铝化镍衬底。