Atomic structure and mechanical response of coincident stacking faults in boron suboxide
We report the atomic structure of coincident stacking faults (SFs) in superhard boron suboxide (B6O) by combining annular bright field scanning transmission electron microscopy and quantum mechanics (QM) simulations. Different from simple SFs, which only lead to the symmetry breaking, the coincident...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2019-02-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21663831.2018.1556184 |
| _version_ | 1819112570583252992 |
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| author | Kolan Madhav Reddy Pan Liu Yidi Shen Takeshi Goto Qi An M. W. Chen |
| author_facet | Kolan Madhav Reddy Pan Liu Yidi Shen Takeshi Goto Qi An M. W. Chen |
| author_sort | Kolan Madhav Reddy |
| collection | DOAJ |
| description | We report the atomic structure of coincident stacking faults (SFs) in superhard boron suboxide (B6O) by combining annular bright field scanning transmission electron microscopy and quantum mechanics (QM) simulations. Different from simple SFs, which only lead to the symmetry breaking, the coincident SF junctions in the complex B6O result in local chemical configuration changes by forming an abnormal three-oxygen-atoms chain linking boron icosahedra, instead of the regular two-oxygen-atoms chain in a perfect B6O crystal. QM studies demonstrate that coincident SFs lead to the decreased shear strength under pure shear and indentation conditions and are responsible to the initial failure and amorphization of B6O. |
| first_indexed | 2024-12-22T04:15:37Z |
| format | Article |
| id | doaj.art-fe3e7ba7cf944602a84afc537b3eb9a6 |
| institution | Directory Open Access Journal |
| issn | 2166-3831 |
| language | English |
| last_indexed | 2024-12-22T04:15:37Z |
| publishDate | 2019-02-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj.art-fe3e7ba7cf944602a84afc537b3eb9a62022-12-21T18:39:25ZengTaylor & Francis GroupMaterials Research Letters2166-38312019-02-0172758110.1080/21663831.2018.15561841556184Atomic structure and mechanical response of coincident stacking faults in boron suboxideKolan Madhav Reddy0Pan Liu1Yidi Shen2Takeshi Goto3Qi An4M. W. Chen5Shanghai Jiao Tong UniversityShanghai Jiao Tong UniversityUniversity of Nevada RenoTohoku UniversityUniversity of Nevada RenoShanghai Jiao Tong UniversityWe report the atomic structure of coincident stacking faults (SFs) in superhard boron suboxide (B6O) by combining annular bright field scanning transmission electron microscopy and quantum mechanics (QM) simulations. Different from simple SFs, which only lead to the symmetry breaking, the coincident SF junctions in the complex B6O result in local chemical configuration changes by forming an abnormal three-oxygen-atoms chain linking boron icosahedra, instead of the regular two-oxygen-atoms chain in a perfect B6O crystal. QM studies demonstrate that coincident SFs lead to the decreased shear strength under pure shear and indentation conditions and are responsible to the initial failure and amorphization of B6O.http://dx.doi.org/10.1080/21663831.2018.1556184Boron suboxidetransmission electron microscopystacking faultshear amorphizationmechanical behavior |
| spellingShingle | Kolan Madhav Reddy Pan Liu Yidi Shen Takeshi Goto Qi An M. W. Chen Atomic structure and mechanical response of coincident stacking faults in boron suboxide Materials Research Letters Boron suboxide transmission electron microscopy stacking fault shear amorphization mechanical behavior |
| title | Atomic structure and mechanical response of coincident stacking faults in boron suboxide |
| title_full | Atomic structure and mechanical response of coincident stacking faults in boron suboxide |
| title_fullStr | Atomic structure and mechanical response of coincident stacking faults in boron suboxide |
| title_full_unstemmed | Atomic structure and mechanical response of coincident stacking faults in boron suboxide |
| title_short | Atomic structure and mechanical response of coincident stacking faults in boron suboxide |
| title_sort | atomic structure and mechanical response of coincident stacking faults in boron suboxide |
| topic | Boron suboxide transmission electron microscopy stacking fault shear amorphization mechanical behavior |
| url | http://dx.doi.org/10.1080/21663831.2018.1556184 |
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