兰州大学机构库 >物理科学与技术学院
Atomic-scale insights into omega-variants in Galfenol triggered by displacive-diffusive transformation
Guan, Chaoshuai1,2; Chen, Bin1,2; Jiang, Liping3; Karim, Abdul1,2,4; Jia, Lei1,2; Hu, Yang1,2; Liang, Yuping3; Deng, Xia1,2; Zhang, Junwei1,2; Zhu, Liu1,2; Bi, Kaiqi1,2; Li, Hongli1,2; Zhang, Hong1,2; Si, Mingsu1,2; Peng, Yong1,2
2021-07
Source PublicationMATERIALS & DESIGN
ISSN0264-1275
Volume205
AbstractGalfenol owing excellent deformation due to lattice softening are regarded as a new generation of smart magnetostrictive materials. However, the lack of direct probes of phase transformation and intermediate phase related to lattice softening blocks the comprehensive understanding of their intrinsic magnetostrictive mechanism and further improvement of their performance. In this work, we firstly report an atomic observation of omega phase transformation in Galfenol under low temperature aging by spherical aberration-corrected transmission electron microscopy. The omega precipitates with two variants are directly probed to be decomposed from FeGa bcc matrix with the assistances of both spinodal decomposition and displacive transformation. Their orientation relationships with the long range ordered bcc structure of D0(3) can be well indexed into (0003)(omega 1)[11 (2) over bar0](omega 1) parallel to (4 (4) over bar(4) over bar)(D03)[0 (1) over tilde1](D03) parallel to ((4) over bar 40 (1) over bar)(omega 2)[11 (2) over bar0](omega 2). Density functional theory calculations unveil the precipitate of omega phase in Galfenol is theoretically possible. Further magnetostrictive measurements reveal the omega phase precipitates deteriorate the magnetostriction of Galfenol as empirically expected. Our work is believed to contribute a further insight of precipitate and structural evolution in Galfenol and is significant to maintain the magnetostriction performance of Galfenol in service. (C) 2021 The Author(s). Published by Elsevier Ltd.
KeywordGalfenol omega phase transformation Aberration-corrected transmission electron microscopy Precipitate Magnetostriction
PublisherELSEVIER SCI LTD
DOI10.1016/j.matdes.2021.109745
Indexed ByEI ; SCOPUS ; SCIE
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000663557400005
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/452340
Collection物理科学与技术学院
Affiliation1.Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China;
2.Lanzhou Univ, Electron Microscopy Ctr Lanzhou Univ, Lanzhou 730000, Peoples R China;
3.Baotou Res Inst Rare Earths, State Key Lab Baiyunobo Rare Earth Resource Res &, Baotou 014030, Peoples R China;
4.Karakorum Int Univ, Dept Phys, Gilgit Baltistan 15100, Pakistan
First Author AffilicationSchool of Physical Sicence and Technology
Recommended Citation
GB/T 7714
Guan, Chaoshuai,Chen, Bin,Jiang, Liping,et al. Atomic-scale insights into omega-variants in Galfenol triggered by displacive-diffusive transformation[J]. MATERIALS & DESIGN,2021,205.
APA Guan, Chaoshuai.,Chen, Bin.,Jiang, Liping.,Karim, Abdul.,Jia, Lei.,...&Peng, Yong.(2021).Atomic-scale insights into omega-variants in Galfenol triggered by displacive-diffusive transformation.MATERIALS & DESIGN,205.
MLA Guan, Chaoshuai,et al."Atomic-scale insights into omega-variants in Galfenol triggered by displacive-diffusive transformation".MATERIALS & DESIGN 205(2021).
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