Formation mechanism of tetragonal nanoprecipitates in Fe–Ga alloys that dominate the material's large magnetostriction

Junming Gou; Tianzi Yang; Ruihua Qiao; Yao Liu; Tianyu Ma

doi:10.1016/j.scriptamat.2020.04.024

Formation mechanism of tetragonal nanoprecipitates in Fe–Ga alloys that dominate the material's large magnetostriction

Junming Gou
, Tianzi Yang
, Ruihua Qiao
, Yao Liu
, Tianyu Ma

Frontier Institute of Science and Technology

Xi'an Jiaotong University

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

Up to now, the formation mechanism of tetragonal nanoprecipitates that may dominate the large magnetostriction of Fe–Ga alloys remains unclear. Here we found that both L6₀- and D0₂₂-type face-centered-tetragonal nanoprecipitates are precursors of the face-centered-cubic L1₂ equilibrium phase, as identified in the isothermally-aged Fe₇₃Ga₂₇ and Fe₇₄Ga₂₆ alloys, respectively. The L6₀ phase is formed due to Ga ordering along <001>-A2 direction and simultaneous lattice distortion. The D0₂₂ phase is formed via diffusionless lattice distortion when the D0₃ ordering degree is sufficient high. These findings may provide a microstructural basis for the large magnetostriction induced by soluting nonmagnetic Ga into body-centered-cubic Fe.

Original language	English
Pages (from-to)	129-133
Number of pages	5
Journal	Scripta Materialia
Volume	185
DOIs	https://doi.org/10.1016/j.scriptamat.2020.04.024
State	Published - Aug 2020

Keywords

Fe–Ga alloy
Magnetostriction
Phase transition
Precipitates

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10.1016/j.scriptamat.2020.04.024

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title = "Formation mechanism of tetragonal nanoprecipitates in Fe–Ga alloys that dominate the material's large magnetostriction",

abstract = "Up to now, the formation mechanism of tetragonal nanoprecipitates that may dominate the large magnetostriction of Fe–Ga alloys remains unclear. Here we found that both L60- and D022-type face-centered-tetragonal nanoprecipitates are precursors of the face-centered-cubic L12 equilibrium phase, as identified in the isothermally-aged Fe73Ga27 and Fe74Ga26 alloys, respectively. The L60 phase is formed due to Ga ordering along <001>-A2 direction and simultaneous lattice distortion. The D022 phase is formed via diffusionless lattice distortion when the D03 ordering degree is sufficient high. These findings may provide a microstructural basis for the large magnetostriction induced by soluting nonmagnetic Ga into body-centered-cubic Fe.",

keywords = "Fe–Ga alloy, Magnetostriction, Phase transition, Precipitates",

author = "Junming Gou and Tianzi Yang and Ruihua Qiao and Yao Liu and Tianyu Ma",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = aug,

doi = "10.1016/j.scriptamat.2020.04.024",

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TY - JOUR

T1 - Formation mechanism of tetragonal nanoprecipitates in Fe–Ga alloys that dominate the material's large magnetostriction

AU - Gou, Junming

AU - Yang, Tianzi

AU - Qiao, Ruihua

AU - Liu, Yao

AU - Ma, Tianyu

PY - 2020/8

Y1 - 2020/8

N2 - Up to now, the formation mechanism of tetragonal nanoprecipitates that may dominate the large magnetostriction of Fe–Ga alloys remains unclear. Here we found that both L60- and D022-type face-centered-tetragonal nanoprecipitates are precursors of the face-centered-cubic L12 equilibrium phase, as identified in the isothermally-aged Fe73Ga27 and Fe74Ga26 alloys, respectively. The L60 phase is formed due to Ga ordering along <001>-A2 direction and simultaneous lattice distortion. The D022 phase is formed via diffusionless lattice distortion when the D03 ordering degree is sufficient high. These findings may provide a microstructural basis for the large magnetostriction induced by soluting nonmagnetic Ga into body-centered-cubic Fe.

AB - Up to now, the formation mechanism of tetragonal nanoprecipitates that may dominate the large magnetostriction of Fe–Ga alloys remains unclear. Here we found that both L60- and D022-type face-centered-tetragonal nanoprecipitates are precursors of the face-centered-cubic L12 equilibrium phase, as identified in the isothermally-aged Fe73Ga27 and Fe74Ga26 alloys, respectively. The L60 phase is formed due to Ga ordering along <001>-A2 direction and simultaneous lattice distortion. The D022 phase is formed via diffusionless lattice distortion when the D03 ordering degree is sufficient high. These findings may provide a microstructural basis for the large magnetostriction induced by soluting nonmagnetic Ga into body-centered-cubic Fe.

KW - Fe–Ga alloy

KW - Magnetostriction

KW - Phase transition

KW - Precipitates

UR - https://www.scopus.com/pages/publications/85084599774

U2 - 10.1016/j.scriptamat.2020.04.024

DO - 10.1016/j.scriptamat.2020.04.024

M3 - 文章

AN - SCOPUS:85084599774

SN - 1359-6462

VL - 185

SP - 129

EP - 133

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Formation mechanism of tetragonal nanoprecipitates in Fe–Ga alloys that dominate the material's large magnetostriction

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Keywords

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