| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an alumina protective coating for a thermal barrier coating, particularly, a thermally sprayed alumina-based coating for a thermal barrier coating particularly used for various surfaces of gas turbine components. <P>SOLUTION: A thermally sprayed alumina-based coating 18 is deposited onto a thermal barrier coating 16 to provide an article 10 such as a turbine engine component with both CMAS mitigation and antifouling. The alumina-based coating increases a melting point of the CMAS to a temperature greater than an operating temperature of the turbine engine component. The surface roughness of the thermally sprayed alumina-based coating is in less than 4.0 micrometers to 0.75 micrometers. The alumina-based coatings include at least 60 weight percent alumina based on a total weight of the alumina-based coating. <P>COPYRIGHT: (C)2009,JPO&INPIT |
