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Tantalum and zirconium induced structural transitions at complex [111] tilt grain boundaries in copper.

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Title: Tantalum and zirconium induced structural transitions at complex [111] tilt grain boundaries in copper.
Authors: Meiners, T.1 (AUTHOR), Duarte, J.M.1 (AUTHOR), Richter, G.2 (AUTHOR), Dehm, G.1 (AUTHOR), Liebscher, C.H.1 (AUTHOR) liebscher@mpie.de
Source: Acta Materialia. May2020, Vol. 190, p93-104. 12p.
Subjects: Tantalum, Crystal grain boundaries, Scanning transmission electron microscopy, Scanning electron microscopy techniques, Zirconium
Abstract: Alloying nanocrystalline copper (Cu) with immiscible elements, such as tantalum (Ta) and zirconium (Zr), is a promising technique to manipulate grain boundary properties and by this suppress grain growth at elevated temperatures. However, insights on the atomistic origins on the influence of impurity elements on grain boundaries are lacking. In this study, the atomistic effects of Ta and Zr on [111] tilt grain boundaries in Cu are investigated by high resolution scanning transmission electron microscopy techniques. In case of Ta, the formation of spherical, nano-scale precipitates in close vicinity to the grain boundaries is observed, but no sign of segregation. The particles induce a repelling force to migrating boundaries and act as local pinning points. The segregation of Zr is observed to occur either at confined grain boundary steps or homogeneously along the boundaries without steps. In both cases a strong disordering of the defect or grain boundary structure is revealed. Furthermore, at low Zr concentrations it induces structural grain boundary transitions and partial atomic reordering of the grain boundary structural units. [ABSTRACT FROM AUTHOR]
Copyright of Acta Materialia is the property of Elsevier B.V. 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.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 142832210
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PubTypeId: academicJournal
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  Data: Tantalum and zirconium induced structural transitions at complex [111] tilt grain boundaries in copper.
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  Data: <searchLink fieldCode="AR" term="%22Meiners%2C+T%2E%22">Meiners, T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Duarte%2C+J%2EM%2E%22">Duarte, J.M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Richter%2C+G%2E%22">Richter, G.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dehm%2C+G%2E%22">Dehm, G.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liebscher%2C+C%2EH%2E%22">Liebscher, C.H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> liebscher@mpie.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Acta+Materialia%22">Acta Materialia</searchLink>. May2020, Vol. 190, p93-104. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Tantalum%22">Tantalum</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+grain+boundaries%22">Crystal grain boundaries</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+transmission+electron+microscopy%22">Scanning transmission electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopy+techniques%22">Scanning electron microscopy techniques</searchLink><br /><searchLink fieldCode="DE" term="%22Zirconium%22">Zirconium</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Alloying nanocrystalline copper (Cu) with immiscible elements, such as tantalum (Ta) and zirconium (Zr), is a promising technique to manipulate grain boundary properties and by this suppress grain growth at elevated temperatures. However, insights on the atomistic origins on the influence of impurity elements on grain boundaries are lacking. In this study, the atomistic effects of Ta and Zr on [111] tilt grain boundaries in Cu are investigated by high resolution scanning transmission electron microscopy techniques. In case of Ta, the formation of spherical, nano-scale precipitates in close vicinity to the grain boundaries is observed, but no sign of segregation. The particles induce a repelling force to migrating boundaries and act as local pinning points. The segregation of Zr is observed to occur either at confined grain boundary steps or homogeneously along the boundaries without steps. In both cases a strong disordering of the defect or grain boundary structure is revealed. Furthermore, at low Zr concentrations it induces structural grain boundary transitions and partial atomic reordering of the grain boundary structural units. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Acta Materialia is the property of Elsevier B.V. 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: 10.1016/j.actamat.2020.02.064
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        Text: English
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      – SubjectFull: Tantalum
        Type: general
      – SubjectFull: Crystal grain boundaries
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      – SubjectFull: Scanning transmission electron microscopy
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      – SubjectFull: Scanning electron microscopy techniques
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      – SubjectFull: Zirconium
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