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Phase Transformations Induced by Grinding: What is Revealed by Molecular Materials

Published online by Cambridge University Press:  26 February 2011

Marc Descamps ,
Jean François Willart ,
Emeline DUDOGNON ,
Ronan LEFORT ,
Sylvain DESPREZ  and
Vincent CARON
Marc Descamps
Affiliation:
[email protected], University Lille1, Physique, UFR de Physique Bat P5, Villeneuve d'Ascq, 59655, France
Jean François Willart
Affiliation:
jean-francois.willart @univ-lille1.fr, University Lille1, Physique, UFR de Physique Bat P5, Villeneuve d'Ascq, 59655, France
Emeline DUDOGNON
Affiliation:
[email protected], University Lille1, Physique, UFR de Physique Bat P5, Villeneuve d'Ascq, 59655, France
Ronan LEFORT
Affiliation:
[email protected], University Rennes1, GMCM, Rennes, 35, France
Sylvain DESPREZ
Affiliation:
[email protected], University Lille1, Physique, UFR de Physique Bat P5, Villeneuve d'Ascq, 59655, France
Vincent CARON
Affiliation:
[email protected], University Lille1, Physique, UFR de Physique Bat P5, Villeneuve d'Ascq, 59655, France
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Abstract

The purpose of this paper is to show some examples of phase transformations induced by grinding molecular materials. These materials are considered because they are extremely sensitive to external disturbances and are generally very good glass formers. This allows investigating more easily a broad range of the parameters which are open to influence the nature of the end product namely the temperature and intensity of grinding. Such an investigation has also a practical interest in pharmaceutical science. It is shown that the position of the grinding temperature with regard to the glass transition temperature of the compound is a key parameter. Comparison of the effects of temperature and intensity of grinding demonstrates that the driven material concept offers a framework to rationalize all the observed transformations.

Keywords

mechanical alloyingphase transformationamorphous
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 979: Symposium HH – Thermodynamics and Kinetics of Phase Transformations in Inorganic Materials , 2006 , 0979-HH06-06
Copyright
Copyright © Materials Research Society 2007

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