Grain refinement mechanism of soft-magnetic alloys with nanocrystals embedded in amorphous matrix

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Tao Liu
  • Hua Zhang
  • Fengyu Kong
  • Anding Wang
  • Yaqiang Dong
  • Aina He
  • Xinmin Wang
  • Hongwei Ni

Detail(s)

Original languageEnglish
Pages (from-to)3558-3565
Journal / PublicationJournal of Materials Research and Technology
Volume9
Issue number3
Online published19 Feb 2020
Publication statusPublished - May 2020

Link(s)

Abstract

To obtain uniform and stable nanostructure with fine α-Fe grains is very important for the wide applications of Fe-based nanocrystalline soft-magnetic alloys. In this study, the nanostructure evolution of the Fe84.75Si2B9P3C0.5Cu0.75 (at.%) alloy after annealing under different conditions was characterized in detail. It is found that the alloy exhibits excellent structural stability, which can maintain small α-Fe grains for a prolonged annealing time at low temperature. The increase of annealing temperature and/or annealing time will lead to the precipitation of compound phases in the intergranular amorphous interphase, which affects the α-Fe grains size greatly and determines the structural stability. The elemental mappings of the nanostructured alloys reveal that metalloid elements are enriched in the intergranular amorphous interphase, wrapping around α-Fe grains. The grain refinement and nanostructure stability of these alloys are derived from the shielding and soft-impingement effects of the core-shell like structure. The nanostructure stability is lost with the precipitation of compound phases in the intergranular amorphous interphase, owing to the break-down of the shielding layer, which results in the rapid coarsening of α-Fe grains by coalescence.

Research Area(s)

  • Grain refinement, Nanostructure, Soft-magnetic alloy, Thermal stability

Citation Format(s)

Grain refinement mechanism of soft-magnetic alloys with nanocrystals embedded in amorphous matrix. / Liu, Tao; Zhang, Hua; Kong, Fengyu; Wang, Anding; Dong, Yaqiang; He, Aina; Wang, Xinmin; Ni, Hongwei; Yang, Yong.

In: Journal of Materials Research and Technology, Vol. 9, No. 3, 05.2020, p. 3558-3565.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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