Solid Solution Mechanisms of Yb and Sc, First-Principles Calculations and Experimental Studies on the Performance Changes of Yb-Sc Co-doped Gd2Zr2O7 (IMAGE)

Tsinghua University Press

Solid Solution Mechanisms of Yb and Sc, First-Principles Calculations and Experimental Studies on the Performance Changes of Yb-Sc Co-doped Gd2Zr2O7

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Yb enters the Gd2Zr2O7 lattice by substituting for Gd, while Sc enters the interstitial sites of the Gd2Zr2O7 lattice when its content does not exceed 5.88 at.%. First-principles calculations were performed to investigate changes in the mechanical and thermophysical properties of Gd2Zr2O7 co-doped with varying compositions of Yb and Sc. GYbSc exhibits excellent mechanical and thermophysical properties. GYbSc was synthesized using the chemical co-precipitation method. Experimental results show that GYbSc possesses high hardness, fracture toughness, and coefficient of thermal expansion, as well as extremely low thermal conductivity and excellent resistance to CMAS corrosion.

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Journal of Advanced Ceramics, Tsinghua University Press

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