Local atomic structure of a near-sigma 5 tilt grain boundary in MgO

Mitsuhiro Saito; Zhongchang Wang; Susumu Tsukimoto; Yuichi Ikuhara

doi:10.1007/s10853-013-7340-7

Local atomic structure of a near-sigma 5 tilt grain boundary in MgO

Mitsuhiro Saito, Zhongchang Wang, Susumu Tsukimoto, Yuichi Ikuhara

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

13 Citations (Scopus)

Abstract

Clear understanding of the structure-property relation in polycrystalline materials requires atomic-resolution imaging of grain boundary (GB) structures especially for the GBs with misalignments. In this study, we apply a bicrystal technique to fabricate the Σ5 and near-Σ5 GBs of MgO with tunable bonding angle and demonstrate that the misalignments in GBs could be compensated by a periodic displacement shift complete dislocation array. The atomic-resolution images reveal that the near-Σ5 GB is composed of an array of normal Σ5 GB structural units intercalated by deformed Σ17 GB units. The atomic-scale characterization presented is applicable to other GB species in a range of polycrystalline materials.

Original language	English
Pages (from-to)	5470-5474
Number of pages	5
Journal	Journal of Materials Science
Volume	48
Issue number	16
DOIs	https://doi.org/10.1007/s10853-013-7340-7
Publication status	Published - 2013 Aug

Keywords

Atomic-scale structure
MgO
Tilt grain boundary
Transmission electron microscopy

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1007/s10853-013-7340-7

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title = "Local atomic structure of a near-sigma 5 tilt grain boundary in MgO",

abstract = "Clear understanding of the structure-property relation in polycrystalline materials requires atomic-resolution imaging of grain boundary (GB) structures especially for the GBs with misalignments. In this study, we apply a bicrystal technique to fabricate the Σ5 and near-Σ5 GBs of MgO with tunable bonding angle and demonstrate that the misalignments in GBs could be compensated by a periodic displacement shift complete dislocation array. The atomic-resolution images reveal that the near-Σ5 GB is composed of an array of normal Σ5 GB structural units intercalated by deformed Σ17 GB units. The atomic-scale characterization presented is applicable to other GB species in a range of polycrystalline materials.",

keywords = "Atomic-scale structure, MgO, Tilt grain boundary, Transmission electron microscopy",

author = "Mitsuhiro Saito and Zhongchang Wang and Susumu Tsukimoto and Yuichi Ikuhara",

note = "Funding Information: Acknowledgements This study was conducted in the research hub for the Advanced Nano Characterization at the Univ. of Tokyo supported by the MEXT of Japan. The authors thank L. Gu and W. Zeng for experimental assistance. M.S. is grateful to the Grant-in-Aid for Scientific Research (C) (Grant no. 23560817) and the IKETANI and IZUMI Science Foundation for financial supports. Z.C.W. acknowledges the financial supports from a Grant-in-Aid for Young Scientists (A) (Grant no. 24686069) and a Grant-in-Aid for Challenging and Exploratory Research (Grant no. 24656376). S. T. appreciates supports from a Grant-in-Aid for Young Scientists (B) (Grant no. 23760622), KIBAN (A) (Grant no. 22246088) and Nippon Sheet Glass Foundation.",

year = "2013",

month = aug,

doi = "10.1007/s10853-013-7340-7",

language = "English",

volume = "48",

pages = "5470--5474",

journal = "Journal of Materials Science",

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T1 - Local atomic structure of a near-sigma 5 tilt grain boundary in MgO

AU - Saito, Mitsuhiro

AU - Wang, Zhongchang

AU - Tsukimoto, Susumu

AU - Ikuhara, Yuichi

N1 - Funding Information: Acknowledgements This study was conducted in the research hub for the Advanced Nano Characterization at the Univ. of Tokyo supported by the MEXT of Japan. The authors thank L. Gu and W. Zeng for experimental assistance. M.S. is grateful to the Grant-in-Aid for Scientific Research (C) (Grant no. 23560817) and the IKETANI and IZUMI Science Foundation for financial supports. Z.C.W. acknowledges the financial supports from a Grant-in-Aid for Young Scientists (A) (Grant no. 24686069) and a Grant-in-Aid for Challenging and Exploratory Research (Grant no. 24656376). S. T. appreciates supports from a Grant-in-Aid for Young Scientists (B) (Grant no. 23760622), KIBAN (A) (Grant no. 22246088) and Nippon Sheet Glass Foundation.

PY - 2013/8

Y1 - 2013/8

N2 - Clear understanding of the structure-property relation in polycrystalline materials requires atomic-resolution imaging of grain boundary (GB) structures especially for the GBs with misalignments. In this study, we apply a bicrystal technique to fabricate the Σ5 and near-Σ5 GBs of MgO with tunable bonding angle and demonstrate that the misalignments in GBs could be compensated by a periodic displacement shift complete dislocation array. The atomic-resolution images reveal that the near-Σ5 GB is composed of an array of normal Σ5 GB structural units intercalated by deformed Σ17 GB units. The atomic-scale characterization presented is applicable to other GB species in a range of polycrystalline materials.

AB - Clear understanding of the structure-property relation in polycrystalline materials requires atomic-resolution imaging of grain boundary (GB) structures especially for the GBs with misalignments. In this study, we apply a bicrystal technique to fabricate the Σ5 and near-Σ5 GBs of MgO with tunable bonding angle and demonstrate that the misalignments in GBs could be compensated by a periodic displacement shift complete dislocation array. The atomic-resolution images reveal that the near-Σ5 GB is composed of an array of normal Σ5 GB structural units intercalated by deformed Σ17 GB units. The atomic-scale characterization presented is applicable to other GB species in a range of polycrystalline materials.

KW - Atomic-scale structure

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KW - Tilt grain boundary

KW - Transmission electron microscopy

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Local atomic structure of a near-sigma 5 tilt grain boundary in MgO

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