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Raman and electron microscopy study of C60 collapse/transformation to a nanoclustered graphene-based disordered carbon phase at high pressure/temperature
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
A.A. Baikov Institute of Metallurgy and Materials Science (IMET), Moscow, Baikov Institute of Metallurgy and Materials Science (IMET), Russian Academy of Sciences.
A.A. Baikov Institute of Metallurgy and Materials Science (IMET), Moscow.
A.A. Baikov Institute of Metallurgy and Materials Science (IMET), Moscow.
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2015 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 252, no 11, p. 2626-2629Article in journal (Refereed) Published
Abstract [en]

Transformation of C60 polymers to a superelastic hard carbon (nanoclustered graphene phase (NGP)) occurring in metal matrix at 5 GPa in a temperature interval of 1000–1100 K was studied by optical, scanning electron microscopy (SEM), and Raman spectroscopy. Raman spectral scan across the sample surface allowed us to identify different stages of the structural transformation. The SEM and Raman spectroscopy data testify for the NGP appearance at the defects concentration sites in the parent fullerite structure. We propose that the buckyballs collapse/formation of the NGP is governed by nucleation and growth (diffusive) mechanism unlike earlier discussed in the literature possibility of the martensitic-type (displacive) character of this transformation.

Place, publisher, year, edition, pages
2015. Vol. 252, no 11, p. 2626-2629
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Experimental physics
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URN: urn:nbn:se:ltu:diva-6977DOI: 10.1002/pssb.201552665ISI: 000364690400046Scopus ID: 2-s2.0-84946434200Local ID: 54debcfd-13d4-4b81-a6a0-24a4447f86f0OAI: oai:DiVA.org:ltu-6977DiVA, id: diva2:979863
Note
Validerad; 2015; Nivå 2; 20151027 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Benavides, VicenteSoldatov, Alexander

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