Synthesis of FeCoNiCuZn single-phase high-entropy alloy by high-frequency electromagnetic-field assisted ball milling

•FeCoNiCuZn single-phase high-entropy alloy powders were directly obtained by HEABM.•The saturation magnetisation get 65.92 emu/g.•The effective bandwidth of RL values below 10 dB get 2.5 GHz.•A type of non-thermal effect have been experimentally confirmed to exist in the processing. In this study,...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 498; p. 166151
Main Authors Yingzhe, Zhang, Yudao, Chen, Qingdong, Qin, Wei, Li
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.03.2020
Elsevier BV
Subjects
Alloy powders
Ball milling
Diffusion effects
Electromagnetic fields
FeCoNiCuZn
Frequency ranges
High entropy alloys
High-entropy alloy
Magnetic materials
Magnetic properties
Magnetic saturation
Mechanical alloying
Microwave absorption
Nonthermal effects
Powder technology
Reflection
Room temperature
Solid solutions
Temperature effects
Magnetic materials
Powder technology
FeCoNiCuZn
Mechanical alloying
High-entropy alloy
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Summary:•FeCoNiCuZn single-phase high-entropy alloy powders were directly obtained by HEABM.•The saturation magnetisation get 65.92 emu/g.•The effective bandwidth of RL values below 10 dB get 2.5 GHz.•A type of non-thermal effect have been experimentally confirmed to exist in the processing. In this study, FeCoNiCuZn single-phase high-entropy alloy powders were synthesized at room temperature for the first time using high-frequency electromagnetic-field assisted ball milling. FeCoNiCuZn was found to be a type of soft magnetic material exhibiting saturation magnetization as high as 65.92 emu/g. Its microwave-absorbing properties were investigated in the frequency range of 2–18 GHz. Its minimum reflection loss reached 14.69 dB at 10.96 GHz, corresponding to a thickness of 1.5 mm and effective bandwidth of reflection loss values below 10 dB (90% of microwave absorption) of 2.5 GHz (9.9–12.4 GHz). In order to understand the mechanism involved, a comparative experiment with the same experimental conditions but without the high-frequency electromagnetic field was performed. The results show that a type of non-thermal effect that changes the diffusion ability and solid solution effect of metal atoms exists in the high-frequency electromagnetic-field-assisted ball milling processing.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2019.166151