Nanocrystalline CoCrFeNiMn high-entropy alloy with tunable ferromagnetic properties. (30th June 2021)

• Record Type: Journal Article
• Authors: Wang, Junjie; Wu, Shangshu; Fu, Shu; Liu, Sinan; Ren, Zhiqiang; Yan, Mengyang; Chen, Shuangqin; Lan, Si; Hahn, Horst; Feng, Tao
• Is Part Of: Journal of materials science & technology. Volume 77(2021)
• Page Start: 126
• Page End: 130
• Publication Date: 2021-06-30
• Subjects: Magnetic -- Nanocrystalline high-entropy alloy -- Laser-Inert gas condensation -- Microstructure; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2020.10.060
• Languages: English
• ISSNs: 1005-0302

Abstract

Graphical abstract: Highlights: Ferromagnetic CoCrFeNiMn HEA was prepared for the first time by inert gas condensation using a laser source (laser-IGC). Saturation magnetization and curie temperature are tunable via heat treatment. CoCrFeNiMn laser-IGC HEA has nano-multiphase structure. Preparation method is proposed which may trigger intensive studies in design concepts of emerging materials with unique structures. Abstract: A nanocrystalline CoCrFeNiMn high-entropy alloy (nc-HEA) with nano-multiphase structure was prepared by inert gas condensation (IGC) using a laser evaporation source. Encouragingly, the laser-IGC nc-HEA exhibits unexpected ferromagnetic behavior and the Curie temperature ( T c ) increased nearly 10 times compared to any CoCrFeNiMn HEAs prepared by various other methods. In addition, the saturation magnetization ( M s ) and T c of the laser-IGC nc-HEA can be controlled via heat treatment, which is resulting from the formation and structural evolution of magnetic nanophases during annealing. This work widens the design toolbox for high-performance nc-HEAs based upon laser-IGC technique.