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    • 69. 发明公开
    • ARTICLES HAVING REDUCED EXPANSION AND HERMETIC ENVIRONMENTAL BARRIER COATINGS AND METHODS FOR THEIR MANUFACTURE
    • 与制造还原蠕变和方法HERMETIC环保LAYERS文章
    • EP2918570A2
    • 2015-09-16
    • EP15158921.5
    • 2015-03-13
    • General Electric Company
    • Rosenzweig, Larry StevenSarrafi-Nour, Reza
    • C04B41/87C04B41/89F01D5/28
    • Articles (200) suitable for use as high-temperature machine components include a substrate (202) and an environmental barrier coating (210) disposed over the substrate (202), where the environmental barrier coating (210) includes at least one hermetic self-sealing layer (212) formed from a mixture including an alkaline earth metal aluminosilicate and a rare-earth silicate, and where the at least one hermetic self-sealing layer (212) exhibits substantially no net remnant or residual expansion when subjected to high temperature heat treatment. The environmental barrier coating (210) can further include a bondcoat (204) disposed between the substrate (202) and the hermetic self-sealing layer (212), a topcoat (214) disposed over the hermetic self-sealing layer (212), and/or an intermediate layer (216) disposed between the hermetic self-sealing layer (212) and the bondcoat (204). The intermediate layer (216) can include a barrier material that is substantially inert with respect to silica.
    • 制品(200),适合于用作高温机部件包括基板(202)和向设置在所述基板(202)的环境屏障涂层(210),其中该环境屏障涂层(210)包括至少一个自密封 从包含于碱土金属硅铝酸盐和稀土类硅酸盐,且其中所述至少一个气密自密封层(212),其显示基本上没有净残余或剩余膨胀的混合物形成密封层(212)在经受高温热 治疗。 环境隔离涂层(210)还可以包括布置在气密自密封层的基板(202)和所述密封自密封层(212),一个顶涂层(214)之间设置一个粘合层(204)(212) 和/或在密封自密封层(212)和粘合涂层(204)之间布置中间层(216)。 该中间层(216)可包括阻挡材料所做的是相对于二氧化硅基本上是惰性的。