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

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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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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Key words

  • permanent magnets
  • heat treatment
  • phase composition
  • magnetic properties
  • coercivity
  • “damage”
  • “restoration”