| 摘要 |
A thermal barrier coating (TBC) for a component intended for use in a hostile environment, such as the superalloy turbine, combustor and augmentor components of a gas turbine engine. The TBC is formed of at least partially stabilized zirconia, preferably yttria-stabilized zirconia (YSZ), and exhibits improved erosion and impact resistance as a result of containing a dispersion of alumina precipitates or particles. The TBC preferably consists essentially of YSZ and the alumina particles, which are preferably dispersed throughout the microstructure of the TBC, including the YSZ grains and grain boundaries. The alumina particles are present in an amount sufficient to increase the impact and erosion resistance of the TBC, preferably at least 5 volume percent of the TBC.
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