摘要:
A method for depositing a protective coating on a complex shaped substrate includes the steps of: (1) dipping a complex shaped substrate into a slurry to form a base coat thereon, the slurry comprising an aqueous solution, at least one refractory metal oxide, and at least one transient fluid additive present in an amount of about 0.1 percent to 10 percent by weight of the slurry; (2) curing the dipped substrate; (3) dipping the substrate into a precursor solution to form a top barrier coat thereon; and (4) heat treating the dipped, cured substrate to form a protective coating.
摘要:
A process of coating an article includes the steps of (1) applying a ceramic based compound to at least one surface of an article to form a layer of ceramic based compound; (2) applying at least one inert compound upon the ceramic based compound layer to form a protective layer, wherein the at least one inert compound is composed of a first inert compound having a cubic crystalline structure of formula (I) A 3 B 2 X 3 O 12 , or a second inert compound comprising a hexagonal crystalline structure of formula (II) A 4 B 6 X 6 O 26 , or a mixture of the first inert compound and the second inert compound; and (3) heat treating the coated article.
摘要翻译:涂覆制品的方法包括以下步骤:(1)将陶瓷基化合物施加到制品的至少一个表面以形成陶瓷基化合物层; (2)在所述陶瓷基化合物层上施加至少一种惰性化合物以形成保护层,其中所述至少一种惰性化合物由具有式(I)的立方晶体结构的第一惰性化合物组成A 3 B 2 X 3 O 12或包含式(II)的化合物的第二惰性化合物A 4 B 6 X 6 O 26,或第一惰性化合物和第二惰性化合物的混合物; 和(3)热处理涂层制品。
摘要:
A turbine engine component is provided which has a substrate (14) and a thermal barrier coating (18) applied over the substrate (14). The thermal barrier coating (18) comprises alternating layers (10, 20, 22, 24) of yttria-stabilized zirconia and a molten silicate resistant material. The molten silicate resistant outer layer (24) may be formed from at least one oxide of a material selected from the group consisting of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, indium, zirconium, hafnium, and titanium or may be formed from a gadolinia-stabilized zirconia. If desired, a metallic bond coat (30) may be present between the substrate (14) and the thermal barrier coating system (18). A method for forming the thermal barrier coating system of the present invention is described.
摘要:
A turbine engine component is provided which has a substrate (14), a yttria-stabilized zirconia coating (10) applied over the substrate (14), and a molten silicate resistant outer layer (20). The molten silicate resistant outer layer (20) is formed from gadolinia or gadolinia-stabilized zirconia. A method for forming the coating system of the present invention is described.