The new complex high-entropy metal boron carbonitride: Microstructure and mechanical properties |
| |
| Authors: | Jingyi Guan Yuchen Liu Daxin Li Zhihua Yang Shaohua Qin Dechang Jia Yu Zhou |
| |
| Affiliation: | 1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, China;2. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China;3. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China |
| |
| Abstract: | In this contribution, the ternary BCN anion systems of high-entropy ceramics (HEC) are consolidated by hot-pressing sintering and the impacts of sintering temperature and the content of amorphous BCN addition on microstructural evolution and mechanical performance were evaluated. Results confirmed that high-entropy, oxide, and BN(C) phases were precipitated for (Ta0.2Nb0.2Zr0.2Hf0.2Ti0.2)(B, C, N) ceramics after sintering at 1900°C. With the decrease of BCN addition, a new phase of MiB2 (Mi representing the metal atoms) occurred. The Vickers hardness, bending strength, elastic modulus, and fracture toughness of the optimized bulk HECs were investigated, obtained at 24.5 ± 2.3 GPa, 522.0 ± 2.6 MPa, 478.9 ± 11.1 GPa, and 5.36 ± 0.56 MPa m1/2, respectively. |
| |
| Keywords: | high-entropy ceramics mechanical properties microstructure phase composition |
|
|
