中国物理B ›› 2023, Vol. 32 ›› Issue (6): 68102-068102.doi: 10.1088/1674-1056/ac9a38
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
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
摘要： 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.
中图分类号: (Cermets, ceramic and refractory composites)
- 81.05.Mh