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Oxidation behavior of Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2C–MxC (M = Ti, Zr, Hf, Nb, Ta) composite ceramic at high temperature |
| Shuai Xu(徐帅)1, Tao Wang(王韬)2,†, Xingang Wang(王新刚)3, Lu Wu(吴璐)4, Zhongqiang Fang(方忠强)4, Fangfang Ge(葛芳芳)5, Xuan Meng(蒙萱)6, Qing Liao(廖庆)7, Jinchun Wei(魏金春)1, and Bingsheng Li(李炳生)7,‡ |
1 School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China;
2 Institute of Fluid Physics, China Academy of Engineering Physic, Mianyang 621900, China;
3 State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai 200050, China;
4 The First Sub-Institute, Nuclear Power Institute of China, Chengdu 610213, China;
5 Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
6 Lanzhou University, Lanzhou 730000, China;
7 State Key Laboratory for Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China |
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Abstract Ti$_{0.2}$Zr$_{0.2}$Hf$_{0.2}$Nb$_{0.2}$Ta$_{0.2}$C-$M_{x}$C composite ceramic was prepared by hot press sintering, with the Ti$_{0.2}$Zr$_{0.2}$Hf$_{0.2}$Nb$_{0.2}$Ta$_{0.2}$C high-entropy carbide as the main phase. Secondary phase $M_{x}$C ($M={\rm Ti}$, Zr, Hf, Nb, Ta) was found to be distributed relatively uniform in the composite ceramic. The oxidation behavior of the ceramic was examined after exposure to 923 K and 1173 K. Morphology of the surface and cross sections of all oxidation samples were observed. The characteristics of the oxidation behavior of the high-entropy carbide and the secondary phase $M_{x}$C were compared and analyzed. The secondary phases (such as Ti-rich carbide or Hf-rich carbide) in the material were seriously oxidized at 923 K and 1173 K, which reflects the superior oxidation performance of the high-entropy carbide. The nano high-entropy oxides with Ti, Zr, Hf, Nb, Ta, and O elements were discovered by oxidation of the composite ceramic. This research will help deepen the understanding of the oxidation mechanism of high-entropy carbide and composite ceramic.
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Received: 31 May 2022
Revised: 29 September 2022
Accepted manuscript online: 14 October 2022
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PACS:
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81.05.Mh
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(Cermets, ceramic and refractory composites)
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81.65.Mq
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(Oxidation)
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68.47.Gh
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(Oxide surfaces)
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81.40.-z
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(Treatment of materials and its effects on microstructure, nanostructure, And properties)
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| Fund: Project supported by the Doctoral Research Fund of Southwest University of Science and Technology (Grant No. 20zx7104), the Sichuan Science and Technology Program (Grant No. 2020ZYD055), and the National Natural Science Foundation of China (Grant Nos. 11905206 and 12075194). |
Corresponding Authors:
Tao Wang, Bingsheng Li
E-mail: wangtaoxtc@gmail.com;libingshengmvp@163.com
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Cite this article:
Shuai Xu(徐帅), Tao Wang(王韬), Xingang Wang(王新刚), Lu Wu(吴璐),Zhongqiang Fang(方忠强), Fangfang Ge(葛芳芳), Xuan Meng(蒙萱),Qing Liao(廖庆), Jinchun Wei(魏金春), and Bingsheng Li(李炳生) Oxidation behavior of Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2C–MxC (M = Ti, Zr, Hf, Nb, Ta) composite ceramic at high temperature 2023 Chin. Phys. B 32 068102
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