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Detailed mapping of reaction diagrams for metastable phases
Umeå University, Faculty of Science and Technology, Department of Physics.
2012 (English)In: Proceedings of Symposium MM, Materials under extreme environments, Fall Meeting 2012 of the Materials Research Society, Cambridge: Cambridge University Press, 2012, 1685- p.Conference paper, Poster (Refereed)
Abstract [en]

A method is presented to map reaction diagrams for metastable phases by treating a rod-shaped sample under high pressure in a known temperature gradient, such that each point on the sample is treated at a unique, known temperature. After quenching to ambient conditions the structural properties of the sample can be studied by spectroscopic or other techniques. The accuracy and resolution in temperature is mainly limited by the uncertainties in the measured temperature distribution during treatment and the uncertainty in position during analysis. The method is tested by re-mapping the polymerization reaction of C60 under high pressure in the range 0.8 – 2 GPa. Preliminary data show surprisingly sharp "reaction boundaries" at certain temperatures, signalling the onset of dimerization and polymerization of the material.

Place, publisher, year, edition, pages
Cambridge: Cambridge University Press, 2012. 1685- p.
, MRS Online Proceedings Library, ISSN 0272-9172 ; 1519
Keyword [en]
phase diagram, high pressure, metastability, methods, spectroscopy
National Category
Condensed Matter Physics
Research subject
Physics Of Matter
URN: urn:nbn:se:umu:diva-64493DOI: 10.1557/opl.2012.1685OAI: diva2:601762
2012 Fall Meeting of the Materials Research Society
Swedish Research Council, 621-2010-3732
Available from: 2013-02-01 Created: 2013-01-30 Last updated: 2013-02-01Bibliographically approved

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