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    Beta-phase nickel aluminide overlay coatings and process therefor
    3.
    发明授权
    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：US07150922B2

    公开(公告)日：2006-12-19

    申请号：US10248056

    申请日：2002-12-13

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

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

    IPC分类号： B32B15/04 ,  F03B3/12

    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）。

    Thermal barrier coating with improved strength and fracture toughness
    6.
    发明授权
    Thermal barrier coating with improved strength and fracture toughness 有权
    热障涂层具有改善的强度和断裂韧性

    公开(公告)号：US06663983B1

    公开(公告)日：2003-12-16

    申请号：US10064562

    申请日：2002-07-26

    申请人： Ramgopal Darolia ,  Joseph David Rigney

    发明人： Ramgopal Darolia ,  Joseph David Rigney

    IPC分类号： B32B1504

    CPC分类号： C23C28/3215 ,  C23C14/083 ,  C23C28/321 ,  C23C28/345 ,  C23C28/3455 ,  F01D5/288 ,  F05D2230/90 ,  F05D2300/611 ,  Y10T428/12611 ,  Y10T428/25

    摘要： A thermal barrier coating (TBC) (26) for a component (10) intended for use in a hostile environment, such as the superalloy turbine, combustor and augmentor components of a gas turbine engine. The TBC (26) is formed of at least partially stabilized zirconia, preferably yttria-stabilized zirconia (YSZ), and exhibits improved strength and fracture toughness as a result of containing a dispersion of chromia precipitates or particles (32). The TBC (26) preferably consists essentially of YSZ and the chromia particles (32), which are preferably dispersed throughout the microstructure of the TBC (26), including the YSZ grains (30) and grain boundaries. The chromia particles (32) constitute at least 1 to about 10 volume percent of the TBC (26).

    摘要翻译： 用于在敌对环境中使用的组件（10）的隔热涂层（TBC）（26），例如燃气涡轮发动机的超级合金涡轮机，燃烧器和增压器部件。 TBC（26）由至少部分稳定的氧化锆，优选氧化钇稳定的氧化锆（YSZ）形成，并且由于含有氧化铬析出物或颗粒（32）的分散体而显示出改善的强度和断裂韧性。 TBC（26）优选基本上由YSZ和氧化铬颗粒（32）组成，其优选分散在包括YSZ晶粒（30）和晶界的TBC（26）的整个微结构中。 氧化铁颗粒（32）构成TBC（26）的至少1至约10体积％。

    Process for a beta-phase nickel aluminide overlay coating
    10.
    发明授权
    Process for a beta-phase nickel aluminide overlay coating 有权
    一种β相镍铝覆盖涂层的工艺

    公开(公告)号：US07244467B2

    公开(公告)日：2007-07-17

    申请号：US10604368

    申请日：2003-07-15

    申请人： Theodore Robert Grossman ,  Ramgopal Darolia ,  Joseph David Rigney

    发明人： Theodore Robert Grossman ,  Ramgopal Darolia ,  Joseph David Rigney

    IPC分类号： C23C16/00

    CPC分类号： C23C14/5886 ,  C23C4/18 ,  C23C14/16 ,  C23C26/00 ,  C23C28/3215 ,  C23C28/345 ,  C23C28/3455

    摘要： A process for forming a beta-phase nickel aluminide (NiAl) overlay coating that is suitable for use as a bond coat for a thermal barrier coating (TBC). The overlay coating is deposited by a method that produces a generally columnar grain structure in which grains extend through the coating such that at least some grain boundaries are open at the coating surface. The coating is then peened with a particulate media, followed by heating the overlay coating to a temperature sufficient to cause the overlay coating to recrystallize and form new grain boundaries that are not open to the outer surface of the coating and significantly less susceptible to accelerated oxidation than the original grain boundaries. The particulate media is formed of a composition containing nickel and aluminum, such that an oxide scale that forms on the surface of the coating after the peening operation is substantially free of deleterious oxide compounds, notably iron-containing spinels.

    摘要翻译： 用于形成适合用作热障涂层（TBC）的粘合涂层的β-相镍铝化物（NiAl）覆盖涂层的方法。 覆盖涂层通过产生大致柱状晶粒结构的方法沉积，其中晶粒延伸穿过涂层，使得至少一些晶界在涂层表面开口。 然后用颗粒介质对涂层进行喷丸处理，然后将覆盖涂层加热至足以使覆盖涂层再结晶并形成不对涂层外表面开放的新晶粒边界，并显着降低易受加速氧化影响的温度 比原来的晶界。 颗粒介质由包含镍和铝的组合物形成，使得在喷丸操作之后在涂层表面上形成的氧化皮基本上不含有害氧化物化合物，特别是含铁尖晶石。