A Promising Sm1.9Ca0.1Zr2O6.95 Ceramic for Thermal Barrier Coatings

Qiang Xu; Wei Pan; Chun Lei Wan; Long Hao Qi; He Zhuo Miao

doi:10.4028/www.scientific.net/KEM.336-338.1762

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Influence of Infiltration Additives on the Phase, Microstructure and Oxidation Resistance of SiC Coating for Graphite Materials
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Thermal Cycling Behavior of Lanthanum-Cerium Oxide Thermal Barrier Coatings Prepared by Air Plasma Spraying
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Fabrication and Isothermal Oxidation Behavior of the Co-Deposited EB-PVD (NiAl + YSZ) Coating
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 336-338A Promising Sm1.9Ca0.1Zr2O6.95 Ceramic for Thermal...

A Promising Sm_1.9Ca_0.1Zr₂O_6.95 Ceramic for Thermal Barrier Coatings

Abstract:

Sm1.9Ca0.1Zr2O6.95 ceramic was sintered at 1600°C for 10 h in air by solid-state reaction method. The phase structure and thermal expansion coefficient were measured by XRD and a high-temperature dilatometry, respectively. The results show that the crystal structure of Sm1.9Ca0.1Zr2O6.95 ceramic is still pyrochlore. The doping with calcium cation leads to a shift of the X-ray spectrum of Sm1.9Ca0.1Zr2O6.95 ceramic to lower 2θ values. The experiments also show that the thermal expansion coefficients of Sm1.9Ca0.1Zr2O6.95 ceramic are higher than those of Sm2Zr2O7 ceramic. These results are related to the vacancy induced by doped calcium cation in the samarium lattice.

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Key Engineering Materials (Volumes 336-338)

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1762-1763

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.336-338.1762

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Online since:

April 2007

Authors:

Qiang Xu, Wei Pan, Chun Lei Wan, Long Hao Qi, He Zhuo Miao

Keywords:

Calcium Cation, Sm₂Zr₂O₇ Ceramic, Thermal Barrier Coating (TBC), Thermal Expansion

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