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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Published in | Journal of magnetism and magnetic materials Vol. 498; p. 166151 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
15.03.2020
Elsevier BV |
Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 0304-8853 1873-4766 |
DOI: | 10.1016/j.jmmm.2019.166151 |