| 摘要 |
<p>A thermal barrier coating (TBC) (26) and method for forming the coating (26) on a component (10) intended for use in a hostile environment are disclosed. The coating (26) and method are particularly directed to inhibiting sintering, grain coarsening/growth and pore redistribution in the coating (26) during high temperature excursions by providing limited amounts of extremely fine carbide-based and/or nitride-based precipitates (34) preferably formed at defects and pores (32) at and between the grain boundaries of the TBC microstructure. The precipitates (34) pin the TBC grain boundaries and pores (32) during high temperature excursions, with the effect that the TBC microstructure is thermally stabilized. A coating (26) containing the carbides and/or nitrides can be formed using a physical vapor deposition technique in an atmosphere that contains carbon and/or nitride gases or compounds thereof, or by evaporating a source material that contains carbon, carbon-containing compounds, carbides and/or nitrides. <IMAGE></p> |
