Effect of Yb3+–Ce4+ content on mechanical, thermophysical, and CMAS resistance properties of La2−xYbxZr2−xCexO7 ceramics

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2025-07-25 DOI:10.1111/ijac.70024

Zheng Chen, Pengsen Zhao, Haizhong Zheng, Guifa Li, Yongxiang Geng, Yixin Xiao, Hongbo Guo, Jian He

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Abstract

Mechanical, thermophysical, and CMAS resistance properties of La₂₋_xYb_xZr₂₋_xCe_xO₇ (x = 0.00, 0.25, 0.50, 0.75, 1.00) ceramics were studied. La₂₋_xYb_xZr₂₋_xCe_xO₇ (x ≠ 0.0) has higher Vickers hardness (H_V) and fracture toughness (K_IC) than La₂Zr₂O₇. When the Yb³⁺–Ce⁴⁺ concentration of La₂₋_xYb_xZr₂₋_xCe_xO₇ grows, its thermal conductivity drops, thermal expansion coefficient increases, and CMAS corrosion resistance improves. LaYbZrCeO₇ has the smallest thermal conductivity (1200°C, 1.285 W/(m K)), the largest thermal expansion coefficient (1200°C, 10.554 × 10⁻⁶/K), and the best CMAS corrosion resistance (1300°C, 30 min, the reaction layer thickness is merely ∼5.1 µm). Its H_V and K_IC values were 10.10 GPa and 2.14 MPa m^1/2, respectively, much higher than those of La₂Zr₂O₇ (8.20 GPa, 1.77 MPa m^1/2). Thus, LaYbZrCeO₇ shows good comprehensive performance.

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Yb3+ -Ce4 +含量对La2−xYbxZr2−xCexO7陶瓷力学、热物理和抗CMAS性能的影响

研究了La2−xYbxZr2−xCexO7 （x = 0.00, 0.25, 0.50, 0.75, 1.00）陶瓷的力学、热物理和抗CMAS性能。La2−xYbxZr2−xCexO7 （x≠0.0）的维氏硬度（HV）和断裂韧性（KIC）均高于La2Zr2O7。当La2−xYbxZr2−xCexO7的Yb3+ -Ce4 +浓度增大时，其导热系数下降，热膨胀系数增大，抗CMAS腐蚀性能提高。LaYbZrCeO7的导热系数最小（1200℃，1.285 W/(m K)），热膨胀系数最大（1200℃，10.554 × 10−6/K），抗CMAS腐蚀性能最佳（1300℃，30 min，反应层厚度仅为~ 5.1µm）。其HV和KIC值分别为10.10 GPa和2.14 MPa m1/2，远高于La2Zr2O7的8.20 GPa和1.77 MPa m1/2。因此，LaYbZrCeO7具有良好的综合性能。

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来源期刊

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;