中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 10 October 2025 |
（1. Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China;
2. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;
3. School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, United Kingdom;
4. Institute for Applied Materials (IAM-WK), Karlsruhe Institute of Technology (KIT), Karlsruhe 76131, Germany）
Abstract:The novel core-shell SiC@CoCrFeNiMn high-entropy alloy (HEA) matrix composites (SiC@HEA) were successfully prepared via mechanical ball milling and vacuum hot-pressing sintering (VHPS). After sintering, the microstructure was composed of FCC solid solution, Cr23C6 carbide phases, and Mn2SiO4 oxy-silicon phase. The relative density, hardness, tensile strength, and elongation of SiC@HEA composites with 1.0 wt.% SiC were 98.5%, HV 358.0, 712.3 MPa, and 36.2%, respectively. The core-shell structure had a significant deflecting effect on the cracks. This effect allowed the composites to effectively maintain the excellent plasticity of the matrix. As a result, the core-shell SiC@HEA composites obtained superior strength and plasticity with multiple mechanisms.
Key words: high-entropy alloy; SiC nanoparticles; microstructure design; core-shell structure; tensile properties; strength and plasticity synergy
