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

Vanalysa Ly; Stephane Gorsse; Kiyonori Suzuki; Christopher Hutchinson

doi:10.4028/www.scientific.net/MSF.654-656.1166

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

Vanalysa Ly
, Stephane Gorsse
, Kiyonori Suzuki
, Christopher Hutchinson

Materials Science & Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

1 Citation (Scopus)

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 language	English
Title of host publication	Materials Science Forum
Editors	Jian-Feng Nie, Allan Morton
Place of Publication	Switzerland
Publisher	Trans Tech Publications
Pages	1166-1169
Number of pages	4
Volume	654-656
ISBN (Print)	0878492550, 9780878492558
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.654-656.1166
Publication status	Published - 2010
Event	Pacific Rim International Conference on Advanced Materials and Processing 2010 - Cairns Qld Australia, Cairns, Australia Duration: 2 Aug 2010 → 6 Aug 2010 Conference number: 7th

Publication series

Name	Materials Science Forum
Volume	654-656
ISSN (Print)	02555476

Conference

Conference	Pacific Rim International Conference on Advanced Materials and Processing 2010
Abbreviated title	PRICM-7
Country/Territory	Australia
City	Cairns
Period	2/08/10 → 6/08/10

Keywords

Fe-Nd-B
Metallic glasses
Nanocomposite magnets
Precipitation modelling

Access to Document

10.4028/www.scientific.net/MSF.654-656.1166

Cite this

Ly, V., Gorsse, S., Suzuki, K., & Hutchinson, C. (2010). Modelling the crystallization reactions of amorphous precursors in Fe ₃B/Nd₂Fe₁₄B nanocomposite magnets. In J.-F. Nie, & A. Morton (Eds.), Materials Science Forum (Vol. 654-656, pp. 1166-1169). (Materials Science Forum; Vol. 654-656). Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/MSF.654-656.1166

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title = "Modelling the crystallization reactions of amorphous precursors in Fe 3B/Nd2Fe14B nanocomposite magnets",

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.",

keywords = "Fe-Nd-B, Metallic glasses, Nanocomposite magnets, Precipitation modelling",

author = "Vanalysa Ly and Stephane Gorsse and Kiyonori Suzuki and Christopher Hutchinson",

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editor = "Jian-Feng Nie and Allan Morton",

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note = "Pacific Rim International Conference on Advanced Materials and Processing 2010, PRICM-7 ; Conference date: 02-08-2010 Through 06-08-2010",

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Ly, V, Gorsse, S, Suzuki, K & Hutchinson, C 2010, Modelling the crystallization reactions of amorphous precursors in Fe ₃B/Nd₂Fe₁₄B nanocomposite magnets. in J-F Nie & A Morton (eds), Materials Science Forum. vol. 654-656, Materials Science Forum, vol. 654-656, Trans Tech Publications, Switzerland, pp. 1166-1169, Pacific Rim International Conference on Advanced Materials and Processing 2010, Cairns, Queensland, Australia, 2/08/10. https://doi.org/10.4028/www.scientific.net/MSF.654-656.1166

Modelling the crystallization reactions of amorphous precursors in Fe ₃B/Nd₂Fe₁₄B nanocomposite magnets. / Ly, Vanalysa; Gorsse, Stephane; Suzuki, Kiyonori et al.
Materials Science Forum. ed. / Jian-Feng Nie; Allan Morton. Vol. 654-656 Switzerland: Trans Tech Publications, 2010. p. 1166-1169 (Materials Science Forum; Vol. 654-656).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

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AB - 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.

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