| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for high velocity air plasma spraying (APS) of a protective coating system, such as a bond coat with or without an overlying ceramic thermal barrier coat, to a superalloy metal substrate. <P>SOLUTION: Application of MCrAlY alloy bond particles (where M is at least one of iron, cobalt, or nickel) onto the metal substrate is maintained at a particle velocity of at least 400 m/s, for example within a range of 400 m/s to 700 m/s. The resulting bond coat on the metal substrate has a surface roughness of about 300 to 500 μinch Ra, and a density of at least 90% of theoretical density. The protective coating may include a ceramic thermal battier coat applied over the bond coat by any suitable process. <P>COPYRIGHT: (C)2011,JPO&INPIT |
