Preparation and Properties of Sm2Zr2O7 Ceramics for Thermal Barrier Coatings by APS

Xian Kai Sun; Quan Sheng Wang; Yan Bo Liu; Xian Jin Ning; Can Wang

doi:10.4028/www.scientific.net/AMR.354-355.478

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 354-355Preparation and Properties of Sm2Zr2O7 Ceramics...

Preparation and Properties of Sm₂Zr₂O₇ Ceramics for Thermal Barrier Coatings by APS

Abstract:

Material of Sm₂Zr₂O₇ composition powder was synthesized by coprecipitation method using Sm₂O₃ and ZrOCl₂•8H₂O as raw materials, and applied as ceramic topcoats of thermal barrier coating (TBC) by atmospheric plasma spraying (APS). The ceramics powder was prepared with proper distribution of particle size about 30-70μm by spray-dried method. Phase analyses revealed that Sm₂Zr₂O₇ coatings keeping the single phase with pyrochlore structure before and after the thermal cycling test. The thermally grown oxide at the topcoat-bondcoat interface and the formation of transverse crack were the major factors that lead to the coating failure on thermal cycling.

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Advanced Materials Research (Volumes 354-355)

Pages:

478-482

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.354-355.478

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Online since:

October 2011

Authors:

Xian Kai Sun, Quan Sheng Wang, Yan Bo Liu, Xian Jin Ning, Can Wang

Keywords:

Atmospheric Plasma Spraying, Rare-Earth Zirconate, Thermal Barrier Coating (TBC), Thermal Shock Resistance

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