التفاصيل البيبلوغرافية
| العنوان: |
Metal-carbide eutectics with multiprincipal elements make superrefractory alloys |
| المؤلفون: |
Wei, Qinqin, Xu, Xiandong, Shen, Qiang, Luo, Guoqiang, Zhang, Jian, Li, Jia, Fang, Qihong, Liu, Chain-Tsuan, Chen, Mingwei, Nieh, Tai-Gang, Chen, Jianghua |
| المصدر: |
Science Advances ; volume 8, issue 27 ; ISSN 2375-2548 |
| بيانات النشر: |
American Association for the Advancement of Science (AAAS) |
| سنة النشر: |
2022 |
| الوصف: |
Materials with excellent high-temperature strength are now sought for applications in hypersonics, fusion reactors, and aerospace technologies. Conventional alloys and eutectic multiprincipal-element alloys (MPEAs) exhibit insufficient strengths at high temperatures due to low melting points and microstructural instabilities. Here, we report a strategy to achieve exceptional high-temperature microstructural stability and strength by introducing eutectic carbide in a refractory MPEA. The synergistic strengthening effects from the multiprincipal-element mixing and strong dislocation blocking at the interwoven metal-carbide interface make the eutectic MPEA not only have outstanding high-temperature strength (>2 GPa at 1473 K) but also alleviate the room-temperature brittleness through microcrack tip blunting by layered metallic phase. This strategy offers a paradigm for the design of the next-generation high-temperature materials to bypass the low–melting point limitation of eutectic alloys and diffusion-dominated softening in conventional superalloys. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| DOI: |
10.1126/sciadv.abo2068 |
| الإتاحة: |
https://doi.org/10.1126/sciadv.abo2068Test |
| رقم الانضمام: |
edsbas.3084188F |
| قاعدة البيانات: |
BASE |
