Surface preparation process for deposition of ceramic coating

A method of preparing a superalloy component to receive a ceramic thermal barrier coating without an intermediate bond coat is disclosed. The superalloy substrate is degreased, abrasively cleaned, ultrasonically cleaned, washed in an aqueous bath containing a wetting agent, rinsed at least once, and...

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Bibliographische Detailangaben
Hauptverfasser: RISTAU, RAYMOND P, BOSE, SUDHANGSHU, CETEL, ALAN D
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A method of preparing a superalloy component to receive a ceramic thermal barrier coating without an intermediate bond coat is disclosed. The superalloy substrate is degreased, abrasively cleaned, ultrasonically cleaned, washed in an aqueous bath containing a wetting agent, rinsed at least once, and then heat treated in an atmosphere that is non-reactive with the substrate and alumina at a temperature and time sufficient to form a surface alumina layer which is predominantly alumina.