In situ analysis of the structural transformation of glassy carbon under compression at room temperature
Room temperature compression of graphitic materials leads to interesting superhard sp3 rich phases which are sometimes transparent. In the case of graphite itself, the sp3 rich phase is proposed to be monoclinic M-carbon; however, for disordered materials such as glassy carbon the nature of the tran...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
American Physical Society
2019
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| Online Access: | https://link.aps.org/accepted/10.1103/PhysRevB.99.024114 http://hdl.handle.net/20.500.11937/74123 |
| _version_ | 1848763186819366912 |
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| author | Shiell, T. Tomas, Carla de McCulloch, D. McKenzie, D. Basu, A. Suarez-Martinez, Irene Marks, N. Boehler, R. Haberl, B. Bradby, J. |
| author_facet | Shiell, T. Tomas, Carla de McCulloch, D. McKenzie, D. Basu, A. Suarez-Martinez, Irene Marks, N. Boehler, R. Haberl, B. Bradby, J. |
| author_sort | Shiell, T. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Room temperature compression of graphitic materials leads to interesting superhard sp3 rich phases which are sometimes transparent. In the case of graphite itself, the sp3 rich phase is proposed to be monoclinic M-carbon; however, for disordered materials such as glassy carbon the nature of the transformation is unknown. We compress glassy carbon at room temperature in a diamond anvil cell, examine the structure in situ using x-ray diffraction, and interpret the findings with molecular dynamics modeling. Experiment and modeling both predict a two-stage transformation. First, the isotropic glassy carbon undergoes a reversible transformation to an oriented compressed graphitic structure. This is followed by a phase transformation at ~35 GPa to an unstable, disordered sp3 rich structure that reverts on decompression to an oriented graphitic structure. Analysis of the simulated sp3 rich material formed at high pressure reveals a noncrystalline structure with two different sp3 bond lengths. |
| first_indexed | 2025-11-14T10:59:28Z |
| format | Journal Article |
| id | curtin-20.500.11937-74123 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:59:28Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-741232023-04-26T05:27:10Z In situ analysis of the structural transformation of glassy carbon under compression at room temperature Shiell, T. Tomas, Carla de McCulloch, D. McKenzie, D. Basu, A. Suarez-Martinez, Irene Marks, N. Boehler, R. Haberl, B. Bradby, J. Room temperature compression of graphitic materials leads to interesting superhard sp3 rich phases which are sometimes transparent. In the case of graphite itself, the sp3 rich phase is proposed to be monoclinic M-carbon; however, for disordered materials such as glassy carbon the nature of the transformation is unknown. We compress glassy carbon at room temperature in a diamond anvil cell, examine the structure in situ using x-ray diffraction, and interpret the findings with molecular dynamics modeling. Experiment and modeling both predict a two-stage transformation. First, the isotropic glassy carbon undergoes a reversible transformation to an oriented compressed graphitic structure. This is followed by a phase transformation at ~35 GPa to an unstable, disordered sp3 rich structure that reverts on decompression to an oriented graphitic structure. Analysis of the simulated sp3 rich material formed at high pressure reveals a noncrystalline structure with two different sp3 bond lengths. 2019 Journal Article http://hdl.handle.net/20.500.11937/74123 10.1103/PhysRevB.99.024114 https://link.aps.org/accepted/10.1103/PhysRevB.99.024114 http://purl.org/au-research/grants/arc/FT140100191 American Physical Society unknown |
| spellingShingle | Shiell, T. Tomas, Carla de McCulloch, D. McKenzie, D. Basu, A. Suarez-Martinez, Irene Marks, N. Boehler, R. Haberl, B. Bradby, J. In situ analysis of the structural transformation of glassy carbon under compression at room temperature |
| title | In situ analysis of the structural transformation of glassy carbon under compression at room temperature |
| title_full | In situ analysis of the structural transformation of glassy carbon under compression at room temperature |
| title_fullStr | In situ analysis of the structural transformation of glassy carbon under compression at room temperature |
| title_full_unstemmed | In situ analysis of the structural transformation of glassy carbon under compression at room temperature |
| title_short | In situ analysis of the structural transformation of glassy carbon under compression at room temperature |
| title_sort | in situ analysis of the structural transformation of glassy carbon under compression at room temperature |
| url | https://link.aps.org/accepted/10.1103/PhysRevB.99.024114 https://link.aps.org/accepted/10.1103/PhysRevB.99.024114 http://hdl.handle.net/20.500.11937/74123 |