Phase composition, microstructure and thermophysical properties of the Srx(Zr0.9Y0.05Yb0.05)O1.95+x ceramics
Phase composition, microstructure and thermophysical properties of the Srx(Zr0.9Y0.05Yb0.05)O1.95+x ceramics
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Srx(Zr0.9Y0.05Yb0.05)O1.95 x 陶瓷的相组成、显微结构和热物性
DOI:
10.1016/j.jeurceramsoc.2020.12.031
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发表时间:
2021-04
期刊:
影响因子:
--
通讯作者:
Manyu Bao
中科院分区:
文献类型:
--
作者:
Wen Ma;Yuanming Gao;Jingxin Zhang;Yu Bai;Ruiling Jia;Hongying Dong;Ruijun Wang;Manyu Bao
Srx(Zr0.9Y0.05Yb0.05)O1.95+x(x=1.0, 0.9, 0.8, 0.7) ceramics were prepared by solid state reaction sintering. The sintered Sr1.0(Zr0.9Y0.05Yb0.05)O2.95is a single-phase solid solution while the sintered Srx(Zr0.9Y0.05Yb0.05)O1.95+x(x=0.9−0.7) are composites, and a significant grain growth inhibition is observed in the sintered Srx(Zr0.9Y0.05Yb0.05)O1.95+x(x=1.0, 0.9). Rare-earth elements distribution in the bulk materials indicates that Yb and Y preferentially substitute Zr-sites in SrZrO3, and the highest solubility of RE2O3in pure SrZrO3is ∼0.8 mol%. The sintered Srx(Zr0.9Y0.05Yb0.05)O1.95+xhave high thermal expansion coefficients up to ∼11.0×10−6K-1(1200°C). Sr0.8(Zr0.9Y0.05Yb0.05)O2.75has the lowest thermal conductivity of 1.38 W·m-1·K-1at 800°C. Srx(Zr0.9Y0.05Yb0.05)O1.95+x(x=1.0, 0.9, 0.8) show no phase transition from 600 to 1400°C, whereas Srx(Zr0.9Y0.05Yb0.05)O1.95+x(x=0.9, 0.8) have excellent high-temperature phase stability over the whole investigated temperature range. Therefore, Srx(Zr0.9Y0.05Yb0.05)O1.95+x (x=1.0, 0.9, 0.8) are considered as promising TBCs materials that might be operated at higher temperatures compared to YSZ.
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影响因子:
3.9
作者:
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DOI:
10.1111/j.1744-7402.2004.tb00182.x
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