知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.018 秒)

    Beta-phase nickel aluminide overlay coatings and process therefor
    1.
    发明申请
    Beta-phase nickel aluminide overlay coatings and process therefor 有权
    β相镀镍及其制备方法

    公开(公告)号：US20040067320A1

    公开(公告)日：2004-04-08

    申请号：US10248056

    申请日：2002-12-13

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Irene Spitsberg ,  Joseph David Rigney ,  Ramgopal Darolia ,  Elissa Hae-Kyung Lee ,  Jeffrey Allan Pfaendtner

    IPC分类号： B32B015/00 ,  B32B015/10 ,  B05D003/02 ,  B05D001/36

    CPC分类号： C23C28/321 ,  C21D7/06 ,  C23C4/18 ,  C23C8/02 ,  C23C26/00 ,  C23C28/345 ,  C23C28/3455 ,  Y10T428/12611 ,  Y10T428/12736 ,  Y10T428/12937 ,  Y10T428/12944

    摘要： A beta-phase nickel aluminide (NiAl) overlay coating (24) and method for modifying the grain structure of the coating (24) to improve its oxidation resistance. The coating (24) is deposited by a method that produces a grain structure characterized by grain boundaries (44) exposed at the outer coating surface (36). The grain boundaries (44) may also contain precipitates (40) as a result of the alloyed chemistry of the coating (24). During or after deposition, the overlay coating (24) is caused to form new grain boundaries (34) that, though open to the outer surface (36) of the coating (24), are free of precipitates or contain fewer precipitates (40) than the as-deposited grain boundaries (44). New grain boundaries (34) are preferably produced by causing the overlay coating (24) to recrystallize during coating deposition or after deposition as a result of a surface treatment followed by heat treatment.

    摘要翻译： β相镍铝化合物（NiAl）覆盖层（24）以及用于改变涂层（24）的晶粒结构以提高其抗氧化性的方法。 通过产生以在外涂层表面（36）处暴露的晶界（44）为特征的晶粒结构的方法沉积涂层（24）。 由于涂层（24）的合金化学，晶界（44）也可含有沉淀物（40）。 在沉积期间或之后，使覆盖涂层（24）形成新的晶粒边界（34），其尽管向涂层（24）的外表面（36）开口，但没有沉淀物或含有较少的沉淀物（40） 比沉积的晶界（44）。 优选通过在涂布沉积期间或沉积后的覆盖涂层（24）进行再结晶，然后进行热处理后的表面处理，来制造新的晶界（34）。

    Selective region vapor phase aluminided superalloy articles
    3.
    发明申请
    Selective region vapor phase aluminided superalloy articles 审中-公开
    选择性区域气相铝化超合金制品

    公开(公告)号：US20040180232A1

    公开(公告)日：2004-09-16

    申请号：US10772534

    申请日：2004-02-05

    申请人： General Electric Company

    发明人： Nripendra Nath Das ,  Joseph David Rigney ,  Jeffrey Allan Pfaendtner ,  Matthew David Saylor

    IPC分类号： B32B015/00

    CPC分类号： C23C10/14 ,  C23C10/02 ,  C23C10/04 ,  C23C10/06 ,  Y02T50/67 ,  Y10T428/12458 ,  Y10T428/12736

    摘要： The present invention is process for forming diffusion aluminide coatings on an uncoated surface of a substrate, without interdiffusing a sufficient amount of aluminum into a coating layer to adversely affect the coating growth potential and mechanical properties of said coating layer. A metal substrate is provided comprising an external surface and an internal passage therein defined by an internal surface, at least a portion of the external surface of the substrate being coated with a coating layer selected from the group consisting of null-NiAl-base, MCrAlX, a line-of-sight diffusion aluminide, a non-line-of-sight diffusion aluminide, a pack diffusion aluminide, and a slurry diffusion aluminide on said substrate. The external surface of the substrate is cleaned. The metal substrate is subjected to a aluminum vapor phase deposition process performed using a fluorine-containing activator selected from the group consisting of AiF3, CrF3, NH4F, and combinations thereof, at a rate in the range of about 0.036 mols of fluorine per ft3/hr of transport gas to about 0.18 mols of fluorine per ft3/hr of transport gas, at a temperature in the range of about 1350null F. (730null C.) to about 1925null F. (1050null C.), using a transport gas selected from the group consisting of argon, nitrogen, hydrogen, and combinations thereof, the transport gas being provided at a flow rate in the range of about 20 ft3/hr to about 120 ft3/hr for a period of time in the range of about 2 hours to about 10 hours. The substrate is then cooled. The present invention is also a superalloy article coated with a diffusion aluminide layer using the diffusion aluminide coating process of the present invention.

    摘要翻译： 本发明是在基材的未涂覆表面上形成扩散铝化物涂层的方法，而不会将足够量的铝相互扩散到涂层中，从而不利地影响涂层生长势和所述涂层的机械性能。 提供了一种金属基底，其包括由内表面限定的外表面和内部通道，所述基底的外表面的至少一部分被涂覆有选自β-NiAl基，MCrAlX ，视线扩散铝化物，非视线扩散铝化物，包层扩散铝化物和在所述衬底上的浆料扩散铝化物。 清洁基板的外表面。 使用选自由AlF 3，CrF 3，NH 4 F组成的组的含氟活化剂及其组合进行铝蒸气相沉积工艺，其范围为约0.036摩尔氟/ 在约1350°F（730℃）至约1925°F的温度范围内，将输送气体输送至约0.18摩尔氟/ 3英里/小时的输送气体。 ℃），使用选自氩，氮，氢及其组合的输送气体，输送气体的流速为约20ft 3 / hr至约120ft 小时/小时，时间范围为约2小时至约10小时。 然后将衬底冷却。 本发明也是使用本发明的扩散铝化物涂覆方法涂覆有扩散铝化物层的超级合金制品。