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Uniaxial-stress-driven transformation in cold compressed glassy carbon
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2017 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 111, no 10, article id 101901Article in journal (Refereed) Published
Abstract [en]

We show that transformation of glassy carbon (GC) into a translucent superhard carbon phase by cold-compression is obtained in the presence of a uniaxial stress field. This transition accompanies with sp(2) to sp(3) bonding change in GC, and it is found that the uniaxial stress strongly favors this bonding transition. The transformation of GC causes photoluminescence and significantly increases light transmissivity. Upon decompression, the high pressure phase can be maintained under large uniaxial stress at a chamber pressure even down to similar to 10GPa. We discuss possible mechanisms of these transitions by a distinct bonding process that occurs in noncrystalline carbon.

Place, publisher, year, edition, pages
Melville: American Institute of Physics (AIP), 2017. Vol. 111, no 10, article id 101901
Keywords [en]
Carbon, glassy carbon, high pressure, phase transition, translucent, superhard material, uniaxial pressure, sp2 bonding, sp3 bonding, deviatoric stress
National Category
Inorganic Chemistry Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-140045DOI: 10.1063/1.4996278ISI: 000410059200011OAI: oai:DiVA.org:umu-140045DiVA, id: diva2:1147913
Available from: 2017-10-09 Created: 2017-10-09 Last updated: 2019-03-06Bibliographically approved

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Sundqvist, Bertil

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
  • Other style
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  • de-DE
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Output format
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