Thermophysical Properties of Ln2(Zr0.7Ce0.3)2O7 (Ln=La, Nd, Sm, Gd) Nanomaterials for Thermal Barrier Coatings

被引：0
|
作者：
Wang Y. [1 ]
Fu B. [1 ]
Chen S. [1 ]
Zou B. [2 ]
Wang C. [1 ]
机构：
[1] College of Physical Science and Technology, Bohai University, Jinzhou
[2] State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2023年 / 37卷 / 11期
基金：
中国国家自然科学基金;
关键词：
activation energy of crystal growth; inorganic non-metallic materials; thermal barrier coating materials; thermophysical property;
D O I：
10.11901/1005.3093.2023.111
中图分类号：
学科分类号：
摘要：
Thermal barrier coatings are widely used in the protection of engine turbine blade, in this paper, Ln2(Zr0.7Ce0.3)2O7 (Ln=La, Nd, Sm, Gd) nanomaterials for the applications of thermal barrier coatings were synthesized by hydrothermal method, the crystallographic structures, morphologies and related thermophysical properties of powders and their bulk materials were comparatively assessed via various techniques. The analysis results of XRD and Raman spectra indicate that La2(Zr0.7Ce0.3)2O7, Nd2(Zr0.7Ce0.3)2O7 and Sm2(Zr0.7Ce0.3)2O7 are pyrochlore structures, while Gd2(Zr0.7Ce0.3)2O7 belongs to fluorite type. The lattice parameters, average particle sizes and specific surface areas were also characterized. The volume shrinkage / relative density, the sintering-resistance properties of the four bulk materials were evaluated by SEM observation. Additionally, their thermophysical properties (such as the activation energy of crystal growth, thermal expansion coefficient, and thermal conductivity) were investigated in detail. As the ionic radii of Ln decreasing, the activation energy of crystal growth and thermal expansion coefficient of Ln2(Zr0.7Ce0.3)2O7 (Ln=La, Nd, Sm, Gd) increased, however the thermal conductivity is just the opposite. © 2023 Chinese Journal of Materials Research. All rights reserved.
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页码：855 / 861
页数：6
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