Effects of an ultra-high magnetic field up to 25 T on the phase transformations of undercooled Co-B eutectic alloy. (10th December 2021)

• Record Type: Journal Article
• Authors: He, Yixuan; Wu, Yuhao; Bu, Fan; Zou, Chengxiong; Bian, Zhangchi; Huang, Qiliang; Liu, Tie; Wang, Qiang; Wang, Jun; Li, Jinshan; Beaugnon, Eric
• Is Part Of: Journal of materials science & technology. Volume 93(2022)
• Page Start: 79
• Page End: 88
• Publication Date: 2021-12-10
• Subjects: Ultra-high magnetic field -- Non-equilibrium solidification -- Solid-state phase transformation -- Metastable phase; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2021.03.055
• Languages: English
• ISSNs: 1005-0302

Abstract

Highlights: Phase transformations in undercooled Co-B alloy under 25T magnetic field are studied. The 25T magnetic field has little effect on homogeneous nucleation. Magnetic field affects heterogeneous nucleation by modifying the wetting angle. Decompostion of Co23 B6 phase is effectively inhibited by applying 25T magnetic field. Abstract: While there have been multiple recent reports in the literature focusing on the effects of magnetic field on the phase transformation behaviors, the research conducted with an ultra-high magnetic field greater than 20 T is still preliminary. In the current study, the structure evolution of Co-B alloys are experimentally studied with undercooling. The effects of a 25 T magnetic field on the solidification behavior and the subsequent solid-state phase transformation behavior have been investigated. The 25 T magnetic field is confirmed to have little effect on the homogeneous nucleation, but have some influence on the heterogeneous nucleation of Co3 B and Co23 B6 phases by modifying the wetting angle θ . The decomposition of Co23 B6 phase in the subsequent cooling process can be effectively suppressed by applying the 25 T magnetic field. The present work might be helpful for not only theoretically understanding the influence of ultra-high magnetic field on the phase transformation behaviors but a potential technology of field-manipulation of magnetic materials.