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Atomic-scale observation of Σ5{310} and Σ9{411} grain boundaries in silicon steel.

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Title: Atomic-scale observation of Σ5{310} and Σ9{411} grain boundaries in silicon steel.
Authors: Futazuka, Toshihiro1 (AUTHOR), Arai, Masaki1 (AUTHOR), Seki, Takehito1,2 (AUTHOR) seki@sigma.t.u-tokyo.ac.jp, Matsubara, Ryo3 (AUTHOR), Morishige, Nobusato4 (AUTHOR), Ikuhara, Yuichi1,5,6 (AUTHOR), Shibata, Naoya1,5 (AUTHOR) shibata@sigma.t.u-tokyo.ac.jp
Source: Journal of Materials Science. Nov2025, Vol. 60 Issue 42, p20776-20785. 10p.
Subjects: Silicon steel, Atomic structure, Crystal grain boundaries, Surface texture, Hypothesis, Scanning transmission electron microscopy
Abstract: Grain boundaries (GBs) play a significant role in the formation of coarse-grained texture of silicon steels. Recently, an unusual GB atomic structure has been found in Σ9{221} GB in silicon steel, where the structure is incommensurate with the bulk crystal structure and structural fluctuation may be present due to the phason mode of the incommensurate structure. This new finding evokes the necessity of atomic-scale structural analysis of GBs in silicon steel for other orientation GBs. In this study, we characterized the atomic structure of Σ5{310} and Σ9{411} GBs in silicon steel using magnetic-field-free atomic resolution scanning transmission electron microscopy and theoretical calculation. We have revealed that the observed GB structures matched the previous theoretical predictions. We suggest that the low GB excess and the distorted local atomic structures may be the key factors for the formation of incommensurate GB structures. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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An: 188799397
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  Label: Title
  Group: Ti
  Data: Atomic-scale observation of Σ5{310} and Σ9{411} grain boundaries in silicon steel.
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  Data: <searchLink fieldCode="AR" term="%22Futazuka%2C+Toshihiro%22">Futazuka, Toshihiro</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Arai%2C+Masaki%22">Arai, Masaki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Seki%2C+Takehito%22">Seki, Takehito</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> seki@sigma.t.u-tokyo.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Matsubara%2C+Ryo%22">Matsubara, Ryo</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Morishige%2C+Nobusato%22">Morishige, Nobusato</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ikuhara%2C+Yuichi%22">Ikuhara, Yuichi</searchLink><relatesTo>1,5,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shibata%2C+Naoya%22">Shibata, Naoya</searchLink><relatesTo>1,5</relatesTo> (AUTHOR)<i> shibata@sigma.t.u-tokyo.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Science%22">Journal of Materials Science</searchLink>. Nov2025, Vol. 60 Issue 42, p20776-20785. 10p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Silicon+steel%22">Silicon steel</searchLink><br /><searchLink fieldCode="DE" term="%22Atomic+structure%22">Atomic structure</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+grain+boundaries%22">Crystal grain boundaries</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+texture%22">Surface texture</searchLink><br /><searchLink fieldCode="DE" term="%22Hypothesis%22">Hypothesis</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+transmission+electron+microscopy%22">Scanning transmission electron microscopy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Grain boundaries (GBs) play a significant role in the formation of coarse-grained texture of silicon steels. Recently, an unusual GB atomic structure has been found in Σ9{221} GB in silicon steel, where the structure is incommensurate with the bulk crystal structure and structural fluctuation may be present due to the phason mode of the incommensurate structure. This new finding evokes the necessity of atomic-scale structural analysis of GBs in silicon steel for other orientation GBs. In this study, we characterized the atomic structure of Σ5{310} and Σ9{411} GBs in silicon steel using magnetic-field-free atomic resolution scanning transmission electron microscopy and theoretical calculation. We have revealed that the observed GB structures matched the previous theoretical predictions. We suggest that the low GB excess and the distorted local atomic structures may be the key factors for the formation of incommensurate GB structures. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Materials Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10853-025-10770-4
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 20776
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      – SubjectFull: Silicon steel
        Type: general
      – SubjectFull: Atomic structure
        Type: general
      – SubjectFull: Crystal grain boundaries
        Type: general
      – SubjectFull: Surface texture
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      – SubjectFull: Hypothesis
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      – SubjectFull: Scanning transmission electron microscopy
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      – TitleFull: Atomic-scale observation of Σ5{310} and Σ9{411} grain boundaries in silicon steel.
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            NameFull: Futazuka, Toshihiro
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            NameFull: Arai, Masaki
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            NameFull: Seki, Takehito
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            NameFull: Morishige, Nobusato
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              M: 11
              Text: Nov2025
              Type: published
              Y: 2025
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