Effects of Gd content on the phase structure and thermal property of (La1-xGdx)2(Zr0.7Ce0.3)2O7 ceramics
Zaoyu Shen,
Guanxi Liu,
Rende Mu,
Limin He,
Zhenhua Xu,
Jianwei Dai
Affiliations
Zaoyu Shen
Key Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing, 100095, PR China
Guanxi Liu
Key Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing, 100095, PR China
Rende Mu
Corresponding author.; Key Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing, 100095, PR China
Limin He
Key Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing, 100095, PR China
Zhenhua Xu
Key Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing, 100095, PR China
Jianwei Dai
Key Laboratory of Advanced Corrosion and Protection for Aviation Materials, Beijing Institute of Aeronautical Materials, Aero Engine Corporation of China, Beijing, 100095, PR China
The La2(Zr0.7Ce0.3)2O7 ceramics is a promising candidate for thermal barrier coatings. Few work has focused on the substitution of La site of La2(Zr0.7Ce0.3)2O7 ceramics in order to improve thermal expansion coefficient and reduce thermal conductivity. In this work, Gd doped-La2(Zr0.7Ce0.3)2O7 ceramics was prepared by solid state reaction. The (La1-xGdx)2(Zr0.7Ce0.3)2O7 exhibits a composite structure with fluorite structure and/or pyrochlore structure. The (La1-xGdx)2(Zr0.7Ce0.3)2O7 ceramics exhibit high thermal expansion coefficient and low thermal conductivity under high temperature. The (La1-xGdx)2(Zr0.7Ce0.3)2O7 material would be one potential TBCs under high temperature.
