Modelling the crystallization reactions of amorphous precursors in Fe 3B/Nd2Fe14B nanocomposite magnets

Vanalysa Ly, Stephane Gorsse, Kiyonori Suzuki, Christopher Hutchinson

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

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Abstract

A physically-based model is proposed for the competitive precipitation of multiple phases (bcc-Fe, Fe3B, Nd2Fe14B, Nd2Fe23B3, NdFe4B4 and Fe2B) from an amorphous Fe-B-Nd matrix. These materials form the basis of a class of nanocomposite hard magnets. The nucleation and growth of the different phases are calculated using computational thermodynamics and kinetics tools with input from a thermodynamic assessment of this system. In some alloy compositions, the phase formation sequence during crystallization shows significant sensitivity to the heating-rate. Model calculations illustrate that this effect cannot be explained by homogeneous nucleation and growth of the phases. The possible role of heterogeneous nucleation is briefly discussed.

Original languageEnglish
Title of host publicationMaterials Science Forum
EditorsJian-Feng Nie, Allan Morton
Place of PublicationSwitzerland
PublisherTrans Tech Publications
Pages1166-1169
Number of pages4
Volume654-656
ISBN (Print)0878492550, 9780878492558
DOIs
Publication statusPublished - 2010
EventPacific Rim International Conference on Advanced Materials and Processing 2010 - Cairns Qld Australia, Cairns, Australia
Duration: 2 Aug 20106 Aug 2010
Conference number: 7th

Publication series

NameMaterials Science Forum
Volume654-656
ISSN (Print)02555476

Conference

ConferencePacific Rim International Conference on Advanced Materials and Processing 2010
Abbreviated titlePRICM-7
Country/TerritoryAustralia
CityCairns
Period2/08/106/08/10

Keywords

  • Fe-Nd-B
  • Metallic glasses
  • Nanocomposite magnets
  • Precipitation modelling

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