Strain tolerant corrosion protecting coating and tape method of application
    89.
    发明专利
    Strain tolerant corrosion protecting coating and tape method of application 审中-公开
    耐腐蚀耐腐蚀涂层和胶带应用方法

    公开(公告)号:JP2008202141A

    公开(公告)日:2008-09-04

    申请号:JP2007320254

    申请日:2007-12-12

    IPC分类号: C23C26/00

    摘要: PROBLEM TO BE SOLVED: To provide a coating composition that is free of hexavalent chromium that can be applied to prevent corrosion of turbine engine components even where the turbine engine components are subjected to elevated operating temperatures in a wide variety of atmospheres.
    SOLUTION: A corrosion resistant tape coating for gas turbine engine includes a glassy ceramic matrix wherein the glassy matrix is silica-based, and includes corrosion resistant particles selected from refractory particles and non-refractory MCrAlX particles, and combinations thereof. The corrosion resistant particles 65 are substantially uniformly distributed within the matrix, and provide the coating with corrosion resistance. Importantly the coating 64 of the present invention has a coefficient of thermal expansion (CTE) greater than that of alumina at engine operating temperatures. The CTE of the coating 64 is sufficiently close to that of the substrate 60 such that the coating 64 does not spall after frequent engine cycling at temperatures above 1200 DEG F.
    COPYRIGHT: (C)2008,JPO&INPIT

    摘要翻译: 要解决的问题:提供一种不含六价铬的涂料组合物,即使在涡轮发动机组件在各种气氛中经受升高的工作温度的情况下,其也可用于防止涡轮发动机部件的腐蚀。 解决方案:用于燃气涡轮发动机的耐腐蚀胶带涂层包括玻璃质陶瓷基体,其中玻璃质基质为二氧化硅基,并且包括选自耐火颗粒和非难熔MCrAlX颗粒的耐腐蚀颗粒及其组合。 耐腐蚀颗粒65基本均匀地分布在基质内,并为涂层提供耐腐蚀性。 重要的是,本发明的涂层64在发动机工作温度下的热膨胀系数(CTE)大于氧化铝的热膨胀系数。 涂层64的CTE足够接近基板60的CTE,使得涂层64在温度高于1200°F的频繁发动机循环之后不会分散。(C)2008,JPO&INPIT