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Mechanism of Reversible Variation of Coercivity Under “Damage – Restoration” Treatment of an Alloy of Type Sm(Co, Fe, Cu, Zr)7.5

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Metal Science and Heat Treatment Aims and scope

The causes of reversible variation of coercivity in alloys for permanent magnets as a result of cyclic heat treatments are analyzed including the effect of magnetostatic interaction between microvolumes on the processes of magnetization reversal and on the magnitude of the reversibility of the coercivity. A scheme of the processes occurring in alloys of the Sm – Co – Cu – Fe – Zr system is suggested, which makes it possible to explain logically the mechanism of the “damage – restoration” phenomenon.

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References

  1. O. A. Arinicheva, A. S. Lileev, M. Raizner, et al., “Effect of cyclic heat treatment in the temperature range of 800 – 400°C on the properties of sintered magnets based on alloy Sm(Co, Fe, Cu, Zr)z,” Metalloved. Term. Obrab. Met., No. 11, 16 – 20 (2014).

  2. A. S. Lileev, V. V. Pinkas, K. V. Voronchikhina, and A. V. Gunbin, “Reversible changes in the coercivity in an Sm – Co – Cu – Zr alloy for permanent magnets under cyclic heat treatment,” Metalloved. Term. Obrab. Met., No. 8, 4 – 8 (2018).

  3. K. Khlopkov, O. Gutfleisch, R. Schafer, L. Schultz, et al., “Interaction domains in die-upset Nd – Fe – B magnets in dependence on the degree of deformation,” JMMM, 272 – 276, 1937 – 1939 (2004).

  4. O. A. Arinicheva, A. S. Lileev, V. A. Sein, and A. S. Starikova, “Simulation of special features of reversal magnetization processes in alloys for permanent magnets based on REM,” Perspekt. Mater., Special Issue (11), 179 – 185, April (2011).

  5. A. S. Lileev, “Phenomenological theory of reversal magnetization processes in permanent magnets from SmCo5- and Nd2Fe14-type alloys,” Metalloved. Term. Obrab. Met., No. 10(736), 4 – 10 (2016).

  6. X. Y. Xiong, T. Ohkubo, T. Koyama, et al., “The microstructure of sintered Sm(Co0.72Fe0.20Cu0.055Zr0.025)7.5 permanent magnet studied by atom probe,” Acta Mater., 52, 737 – 748 (2004).

    Article  CAS  Google Scholar 

  7. H. Sepehri-Amin, J. Thielsch, J. Fischbacher, et al., “Correlation of microchemistry of cell boundary phase and interface structure to the coercivity of Sm(Co0.784Fe0.100Cu0.088Zr0.028)7.19 sintered magnets,” Acta Mater., 126, 1 – 10 (2017).

    Article  CAS  Google Scholar 

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Correspondence to A. S. Lileev.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 17 – 20, September, 2020.

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Lileev, A.S., Reznikov, K.P. Mechanism of Reversible Variation of Coercivity Under “Damage – Restoration” Treatment of an Alloy of Type Sm(Co, Fe, Cu, Zr)7.5. Met Sci Heat Treat 62, 557–559 (2021). https://doi.org/10.1007/s11041-021-00602-y

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  • DOI: https://doi.org/10.1007/s11041-021-00602-y

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