Plasma sprayed ZrO2-CeO2 and ZrO2-CeO2-Y2O3 coatings were investigated to develop advanced thermal barrier coating (TBC) with improved thermal and mechanical properties. The addition of a large amount of CeO2 to ZrO2 decreased the thermal conductivity, but it also reduced the mechanical property like hardness. Addition of Y2O3 to ZrO2-CeO2 was effective to improve the hardness. Double layered coating composed of a low thermal conductive top layer, such as ZrO2-CeO2-Y2O3 and a high strength base layer like yttria stabilized zirconia was fabricated. It exhibited an excellent thermal shock resistance and high thermal barrier capability.

hardness, plasma spraying, thermal barrier coatings, thermal conductivity, thermal shock resistance, yttria stabilized zirconia
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Copyright © 1996 ASM International. All rights reserved.
1996
ASM International
Topics
Thermal barrier coatings Yttria-stabilized zirconia Plasma spray coating Thermal shock resistance Hardness Thermal conductivity
Issue Section:
Thermal Barrier Coatings
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