Forming Mechanism of Dy2Ce2O7 Ceramic for Thermal Barrier Coatings

Hong Song Zhang; Ren Xi Hu; Qiang Xu

doi:10.4028/www.scientific.net/AMR.105-106.383

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 105-106Forming Mechanism of Dy2Ce2O7 Ceramic for Thermal...

Forming Mechanism of Dy₂Ce₂O₇ Ceramic for Thermal Barrier Coatings

Abstract:

The forming mechanism of Dy2Ce2O7 prepared by solid reaction using CeO2 and Dy2O3 as reactants was analyzed by X-ray diffraction method. It is indicated that there is almost no solid solution reaction between Dy2O3 and CeO2 before 1300°C, the Dy3+ cations enter the crystal lattice of CeO2 and substitute sites of Ce4+ cations in the range between 1300°C and 1400°C which resulted in the formation of Dy2O3-CeO2 solid solution. The Dy2O3-CeO2 solid solution transformed gradually into Dy2Ce2O7 after 1400°C and pure Dy2Ce2O7 can be obtained at 1500°C. No other intermediate phases were found in the whole process.

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Advanced Materials Research (Volumes 105-106)

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383-385

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https://doi.org/10.4028/www.scientific.net/AMR.105-106.383

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April 2010

Authors:

Hong Song Zhang, Ren Xi Hu, Qiang Xu

Keywords:

Cerium Oxide, Forming Mechanism, Solid Reaction

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