Core-shell structure and stability of nanocrystalline precipitates in Fe83.3Si4B8P4Cu0.7 soft magnetic amorphous alloy

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Jiacheng Ge
  • Si Lan
  • Zhenduo Wu
  • Lingxiang Shi
  • Anding Wang
  • Yan Zhang
  • Chi Long Lai
  • Kit Ying Leung
  • Junhua Luan
  • Elliot Paul Gilbert

Detail(s)

Original languageEnglish
Article number107846
Journal / PublicationIntermetallics
Volume155
Online published27 Jan 2023
Publication statusPublished - Apr 2023

Abstract

The core-shell nanostructure of α-Fe precipitates was investigated in a recently developed high-performance Fe83.3Si4B8P4Cu0.7 nanocrystalline soft magnetic alloy utilizing small-angle neutron scattering (SANS) and atom probe tomography (APT). SANS measurements under a saturating magnetic field provided evidence of core-shell structures at the nanoscale. Moreover, the core-shell structure was directly visualized from APT analysis, where P-enriched shells were found around Fe-enriched cores due to the large negative heat of mixing between Fe and P elements and the slow diffusion of P atoms. The core-shell nanostructures induced by nanoscale partitioning are effective in stabilizing the residual amorphous matrix and suppressing the crystal growth. Our findings provide insight into the microstructure of Fe-based amorphous alloys and have direct implications in alloy design for the improvement of the soft magnetic properties. © 2023 Elsevier Ltd.

Research Area(s)

  • Amorphous, nanocrystalline alloys, Nanocrystalline structure, Thermal stability, Atom probe, ANGLE NEUTRON-SCATTERING, HIGH B-S, STAGE

Citation Format(s)

Core-shell structure and stability of nanocrystalline precipitates in Fe83.3Si4B8P4Cu0.7 soft magnetic amorphous alloy. / Lu, Chenyu; Ge, Jiacheng; Lan, Si et al.
In: Intermetallics, Vol. 155, 107846, 04.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review