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    • 2. 发明授权
    • Method of forming an improved aluminide bond coat for a thermal barrier coating system
    • 形成用于热障涂层系统的改进的铝化物粘结涂层的方法
    • US06482469B1
    • 2002-11-19
    • US09546518
    • 2000-04-11
    • Irene T. SpitsbergRamgopal Darolia
    • Irene T. SpitsbergRamgopal Darolia
    • C23C1606
    • C23C14/588C23C4/02C23C10/60C23C14/025C23C14/028C23C14/083C23C28/00
    • A thermal barrier coating (TBC) system and method for improving the thermal fatigue life of a thermal barrier coating. The invention entails modifying the surface morphology of an aluminide bond coat that adheres the thermal barrier coating to a substrate of a superalloy component. The aluminide bond coat has columnar grains, such that grain boundaries are exposed at the surface of the bond coat and define ridges. The surface of the bond coat is then treated so that a sufficient amount of material is removed from the grain boundary ridges and other surface peaks to flatten the bond coat surface, i.e., the ridges and peaks are replaced with flattened surfaces that are nearly parallel to the diffusion zone of the bond coat. By removing these surface irregularities, it is believed that a more stable bond coat surface is created where the critical alumina-bond coat interface will exist following a thermal treatment, such as TBC deposition.
    • 一种用于改善热障涂层的热疲劳寿命的隔热涂层(TBC)系统和方法。 本发明需要改变将热障涂层粘附到超级合金部件的基底上的铝化物粘结涂层的表面形态。 铝化物接合涂层具有柱状晶粒,使得晶界在接合涂层的表面暴露并限定脊。 然后处理粘合涂层的表面,使得从晶界脊和其他表面峰除去足够量的材料以使粘合涂层表面平坦化,即,脊和峰被替换为几乎平行于 粘结涂层的扩散区。 通过去除这些表面不规则性,据信在热处理如TBC沉积之后,将产生更稳定的粘合涂层表面,其中临界氧化铝粘合涂层界面将存在。