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    • 5. 发明授权
    • Plasma sprayed thermal bond coat system
    • 等离子喷涂热粘涂层系统
    • US06607789B1
    • 2003-08-19
    • US09842503
    • 2001-04-26
    • Joseph David RigneyMichael James WeimerBangalore Aswatha NagarajYuk-Chiu Lau
    • Joseph David RigneyMichael James WeimerBangalore Aswatha NagarajYuk-Chiu Lau
    • C23C404
    • C23C28/3455C23C4/02C23C28/321C23C28/345Y10T428/12611Y10T428/12944
    • A method for forming a thermal barrier coating system on an article subjected to a hostile thermal environment, such as the hot gas path components of a gas turbine engine. The coating system is generally comprised of a ceramic layer and an environmentally resistant beta phase nickel aluminum intermetallic (&bgr;-NiAl) bond coat that adheres the ceramic layer to the component surface. A thin aluminum oxide scale forms on the surface of the &bgr;-NiAl during heat treatment. The &bgr;-NiAl may contain alloying elements in addition to nickel and aluminum in order to increase the environmental resistance of the &bgr;-NiAl. The &bgr;-NiAl powder having a size in the range of 20-50 microns is applied using air plasma spray techniques to produce a surface having a roughness of 400 microinches or rougher. The ceramic top coat can be applied using inexpensive thermal spray techniques to greater thicknesses than achievable otherwise because of the rough surface finish of the underlying &bgr;-NiAl bond coat.
    • 一种用于在遭受恶劣热环境的制品(例如燃气涡轮发动机的热气路径部件)上形成热障涂层系统的方法。 涂层系统通常包括陶瓷层和环境友好的β相镍铝金属间化合物(β-NiAl)粘合涂层,其将陶瓷层粘附到组件表面。 在热处理期间,在β-NiAl的表面上形成薄的氧化铝垢。 除了镍和铝之外,β-NiAl还可以含有合金元素,以增加β-NiAl的耐环境性。 使用空气等离子喷涂技术施加尺寸在20-50微米范围内的β-NiAl粉末,以产生粗糙度为400微英寸或更粗糙的表面。 陶瓷面漆可以使用廉价的热喷涂技术应用于厚度大于其它可能的厚度,因为底层β-NiAl粘合涂层的粗糙表面光洁度。