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    • 1. 发明申请
    • Method of selective region vapor phase aluminizing
    • 选择性区域气相镀铝的方法
    • US20050084706A1
    • 2005-04-21
    • US10685637
    • 2003-10-15
    • Nripendra DasJoseph RigneyJeffrey PfaendtnerMatthew Saylor
    • Nripendra DasJoseph RigneyJeffrey PfaendtnerMatthew Saylor
    • C23C10/02C23C10/06C23C10/14B32B15/10
    • C23C10/06C23C10/02C23C10/14Y02T50/67Y10T428/12736
    • 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 β-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 AlF3, 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 1350° F. (730° C.) to about 1925° F. (1050° 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.
    • 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电位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。 对金属基板进行铝蒸气相沉积工艺,该方法使用选自AlF 3 N 3,CrF 3 N,NH 4的含氟活化剂 F和它们的组合,以约0.036摩尔氟/ ft 3 /小时的运输气体至约0.18摩尔氟/ ft 3的范围内的速率, 在约1350°F(730℃)至约1925°F(1050℃)的温度范围内使用选自以下的输送气体: 氩气,氮气,氢气及其组合,输送气体的流速为约20ft 3 / hr至约120ft 3 / hr 一段时间在约2小时至约10小时的范围内。 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。