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-...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.展开更多
基金financially supported by National Key R&D Program of China (No.2021YFB3802800)the Equipment Advance Research field Fund (No.80922010401)+6 种基金equipment project of China (JZX7Y20210162400201)Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technologythe Fundamental Research Funds for the Central Universities (Nos.30919011404 and 30919011107)the National Natural Science Foundation of China (Nos.51871120 and 51571119)the Natural Science Foundation of Jiangsu Province (No. BK20200019)the support from Qing Lan projectthe distinguished professor project of Jiangsu province
文摘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.
