Solvent based environmental barrier coatings for high temperature ceramic components
申请人：General Electric Company
公开号：US10094237B2
公开（公告）日：2018-10-09
Environmental barrier coatings for high temperature ceramic components including a bond coat layer; an optional silica layer; and at least one transition layer including: from about 85% to about 100% by volume of the transition layer of a primary transition material including a rare earth disilicate, or a doped rare earth disilicate; and from 0% to about 15% by volume of the transition layer of a secondary material selected from Fe2O3, iron silicates, rare earth iron oxides, Al2O3, mullite, rare earth aluminates, rare earth aluminosilicates, TiO2, rare earth titanates, Ga2O3, rare earth gallates, NiO, nickel silicates, rare earth nickel oxides, Lnb metals, Lnb2O3, Lnb2Si2O7, Lnb2SiO5, borosilicate glass, alkaline earth silicates, alkaline earth rare earth oxides, alkaline earth rare earth silicates, and mixtures thereof; where the transition layer is applied to the component as a slurry including at least an organic solvent, the primary transition material and at least one slurry sintering aid, and where a reaction between the slurry sintering aid and the primary transition material results in the transition layer having a porosity of from 0% to about 15% by volume of the transition layer.
用于高温陶瓷元件的环境阻隔涂层，包括粘结涂层层；可选的二氧化硅层；以及至少一个过渡层，包括按体积计算，过渡层中约 85%至约 100%的主要过渡材料，包括稀土二硅酸盐或掺杂稀土二硅酸盐；按体积计算，0%至约15%的次生材料过渡层，选自Fe2O3、硅酸铁、稀土氧化铁、Al2O3、莫来石、稀土铝酸盐、稀土铝硅酸盐、TiO2、稀土钛酸盐、Ga2O3、稀土没食子酸盐、NiO、硅酸镍、稀土氧化镍、Lnb 金属、Lnb2O3、Lnb2Si2O7、Lnb2SiO5、硼硅酸盐玻璃、碱土硅酸盐、碱土稀土氧化物、碱土稀土硅酸盐以及它们的混合物；其中过渡层以浆料的形式施加到组件上，浆料至少包括有机溶剂、主要过渡材料和至少一种浆料烧结助剂，浆料烧结助剂和主要过渡材料之间的反应导致过渡层的孔隙率为过渡层体积的 0% 至约 15%。
