Graphitization of Glassy Carbon after Compression at Room Temperature
Access Status
Open access via publisher
Authors
Shiell, T.
McCulloch, D.
McKenzie, D.
Field, M.
Haberl, B.
Boehler, R.
Cook, B.
Tomas Andres, Carla de
Suarez-Martinez, Irene
Marks, Nigel
Bradby, J.
Date
2018Type
Journal Article
Metadata
Show full item recordCitation
Shiell, T. and McCulloch, D. and McKenzie, D. and Field, M. and Haberl, B. and Boehler, R. and Cook, B. et al. 2018. Graphitization of Glassy Carbon after Compression at Room Temperature. Physical Review Letters. 120 (21).
Source Title
Physical Review Letters
Additional URLs
ISSN
School
School of Electrical Engineering, Computing and Mathematical Science (EECMS)
Funding and Sponsorship
Collection
Abstract
© 2018 American Physical Society. Glassy carbon is a technologically important material with isotropic properties that is nongraphitizing up to ~3000 °C and displays complete or "superelastic" recovery from large compression. The pressure limit of these properties is not yet known. Here we use experiments and modeling to show permanent densification, and preferred orientation occurs in glassy carbon loaded to 45 GPa and above, where 45 GPa represents the limit to the superelastic and nongraphitizing properties of the material. The changes are explained by a transformation from its sp2 rich starting structure to a sp3 rich phase that reverts to fully sp2 bonded oriented graphite during pressure release.