A systematic microstructure-oriented magnetic property investigation for Al/CoCrFeNi nanocrystalline high-entropy alloys composite(nc-HEAC)is presented.In the initial state,the Al/CoCrFeNi nc-HEAC is composed of face-centered cubic(FCC)-Al,FCC-CoCrFeNi and hexagonal close-packed(HCP)-CoNi phases.High energy synchrotron radiation X-ray diffraction and high-resolution transmission electron microscopy were used to reveal the relationship between microstructure evolution and mag-netic mechanism of Al/CoCrFeNi nc-HEAC during heat treatment.At low-temperature annealing stage,the mag-netic properties are mainly contributed by the HCP-CoNi phase.With the increase of temperature,the diffusion-in-duced phase transition process including the transformation of AlCoCrFeNi HEA from FCC to BCC structure and the growth of B2 phase plays a dominant role in the magnetic properties.It was found that the magnetic properties can be effectively regulated through the control of the thermal diffusion process.The nano dual-phase thermal diffusion-induced phase transition behavior of nanocomposites pre-pared based on laser-IGC technology provides guidance for the diffusion process and microstructure evolution of two phases in composites.

Jun-Jie Wang;Zong-De Kou;Shu Fu;Shang-Shu Wu;Si-Nan Liu;Meng-Yang Yan;Di Wang;Si Lan;Horst Hahn;Tao Feng

School of Material Science and Engineering,Herbert Gleiter Institute of Nanoscience,Nanjing University of Science and Technology,Nanjing 210094,China;Institute of Nanotechnology,Karlsruhe Institute of Technology,Karlsruhe 76021,Germany

稀有金属（英文版）

[1]Jun-Jie Wang;Zong-De Kou;Shu Fu;Shang-Shu Wu;Si-Nan Liu;Meng-Yang Yan;Di Wang;Si Lan;Horst Hahn;Tao Feng-.Microstructure and magnetic properties evolution of Al/CoCrFeNi nanocrystalline high-entropy alloy composite)[J].稀有金属（英文版）,2022(06):2038-2046

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