Uniaxial-stress-driven transformation in cold compressed glassy carbon [Elektronisk resurs]
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Yao, Mingguang (författare)
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Fan, Xianhong (författare)
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Zhang, Weiwei (författare)
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Bao, Yongjun (författare)
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Liu, Ran (författare)
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Sundqvist, Bertil (författare)
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Liu, Bingbing (författare)
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Umeå universitet Teknisk-naturvetenskapliga fakulteten (utgivare)
- Publicerad: Melville : American Institute of Physics (AIP), 2017
- Engelska.
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Ingår i: Applied Physics Letters. - 0003-6951. ; 111:10
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- Relaterad länk:
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http://www.umu.se/ (Värdpublikation)
Sammanfattning
Ämnesord
Stäng
- 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.
Ämnesord
- Natural Sciences (hsv)
- Chemical Sciences (hsv)
- Inorganic Chemistry (hsv)
- Naturvetenskap (hsv)
- Kemi (hsv)
- Oorganisk kemi (hsv)
- Natural Sciences (hsv)
- Physical Sciences (hsv)
- Condensed Matter Physics (hsv)
- Naturvetenskap (hsv)
- Fysik (hsv)
- Den kondenserade materiens fysik (hsv)
- fysik (umu)
- Physics (umu)
Genre
- government publication (marcgt)
Indexterm och SAB-rubrik
- Carbon
- glassy carbon
- high pressure
- phase transition
- translucent
- superhard material
- uniaxial pressure
- sp2 bonding
- sp3 bonding
- deviatoric stress
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