Abstract
Multielement alloy doping is the feature of this paper, and disclosing the relationship between non-equilibrium microstructure and magnetic properties after rapid cooling is the key point. 3 wt% eutectic Al82.8Cu17Fe0.2 alloy was doped into SmCo5 alloy, followed by melt-spinning at 10–40 m/s. It is found all ribbons are composed of Sm(Co, M)5 and Sm2(Co, M)7 phases, but non-equilibrium solidification at different cooling rates results in different distribution characteristics of phases and magnetic properties of the ribbons. The 10 m/s ribbons are composed of Sm–Cu- and Co-rich Sm(Co, M)5 phases and then the lamellate Sm2(Co, M)7 coexists with CeCo5-type Sm(Co, M)5 grains in the 25 m/s ribbons, while the 40 m/s ribbons form a cellular microstructure with Sm2(Co, M)7 grain boundaries and Sm(Co, M)5 intracellular grains. Correspondingly, the coercivity, remanence, and maximum magnetization of 40 m/s ribbons are 74.3%, 64.3%, and 53.2% higher than those of 10 m/s ribbons. At the same time, the coercivity mechanism and microstructure evolution are discussed.
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This work was supported by the General Program from the National Natural Science Foundation of China (NNSFC) (No. 51671078) and the Natural Science Foundation of Hebei province, China (No. E2019202035).
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Wang, LZ., Wang, S., Zhang, ZY. et al. Effect of melt-spinning speed on the microstructure and magnetic properties of Al–Cu–Fe alloy-doped SmCo5 ribbons. Appl. Phys. A 127, 202 (2021). https://doi.org/10.1007/s00339-021-04359-2
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DOI: https://doi.org/10.1007/s00339-021-04359-2