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Title: Graphitization of Glassy Carbon after Compression at Room Temperature

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [2]; ORCiD logo [4];  [5];  [2];  [6];  [6];  [6];  [1]
  1. The Australian National Univ., Canberra, ACT (Australia)
  2. RMIT Univ., Melbourne, VIC (Australia)
  3. The Univ. of Sydney, New South Wales (Australia)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Carnegie Inst. of Washington, Washington, D.C. (United States)
  6. Curtin Univ., Perth, WA (Australia)

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. Furthermore, 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.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; SC0001057
OSTI ID:
1523764
Alternate ID(s):
OSTI ID: 1438522
Journal Information:
Physical Review Letters, Vol. 120, Issue 21; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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Figures / Tables (4)