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Thermal stability of superhard and ultrahard fullerites
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2000 (English)In: Proceedings of International Conference on Engineering and Technological Sciences 2000 (ICETS-2000), vol. 1, Beijng: Chinese Academy of Engineering: New World Press , 2000, 505-511 p.Conference paper, Published paper (Refereed)
Abstract [en]

The thermal stability of superhard and ultrahard carbon phases synthesized from C60 and C70 fullerenes under pressure in the range 9.5-13 GPa and temperature between 670 and 1850 K was investigated by DSC in the range 260-640 K and TGA up to 1200 K. Endothermal heat effects were observed with a peak maximum just below 540 K, a temperature characteristic for breakdown of (2+2) intermolecular links in dimers, 1D and 2D polymers. Exothermal effects, starting from 380 K, were observed for the first time in polymeric fullerenes. These effects are attributed to relaxation processes and to breakdown of other types of intermolecular bonds.

Place, publisher, year, edition, pages
Beijng: Chinese Academy of Engineering: New World Press , 2000. 505-511 p.
Keyword [en]
Fullerenes, C60, high pressure synthesis, polymer, superhard, ultrahard
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-22767OAI: oai:DiVA.org:umu-22767DiVA: diva2:218063
Note
Editors: J. Song and R. YinAvailable from: 2009-05-19 Created: 2009-05-19 Last updated: 2010-01-22

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