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- W3216587095 abstract "Abstract In this work, we have successfully fabricated a novel high-entropy rare-earth zirconate (La 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Yb 0.2 ) 2 Zr 2 O 7 (5RE 2 Zr 2 O 7 ) ceramics and its counterparts by using a new high-speed grinding strategy combined with typical solid-state reaction method. The X-ray diffraction (XRD) and Raman spectroscopy analysis indicated that the as-prepared 5RE 2 Zr 2 O 7 ceramics performed single-phase defect fluorite-type structures with highly sintering resistant and excellent thermal stability. The possibility of formation of 5RE 2 Zr 2 O 7 was verified via first-principles calculations. Meanwhile, the phase structure, thermophysical and mechanical properties of the samples were systematically investigated. The results showed that the 5RE 2 Zr 2 O 7 ceramics demonstrated lower thermal conductivity (0.9-1.72 W·m -1 ·K -1 ) and higher thermal expansion coefficients (10.9 × 10 -6 K -1 at 1273 K) than its counterparts. Furthermore, the 5RE 2 Zr 2 O 7 ceramics presented outstanding mechanical properties including large Young’s modulus (186-257 GPa), higher fracture toughness and lower brittleness index than that of YSZ. Therefore, in view of various excellent properties, the as-prepared 5RE 2 Zr 2 O 7 ceramics possess great potential for applications in the field of thermal barrier coatings." @default.
- W3216587095 created "2021-12-06" @default.
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- W3216587095 date "2021-11-29" @default.
- W3216587095 modified "2023-09-23" @default.
- W3216587095 title "High-entropy Rare-earth Zirconate Ceramics With Low Thermal Conductivity for Advanced Thermal Barrier Coatings" @default.
- W3216587095 doi "https://doi.org/10.21203/rs.3.rs-1098359/v1" @default.
- W3216587095 hasPublicationYear "2021" @default.
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