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Développement d'une cellule haute pression haute température dans la presse Paris-Edimbourg pour la mesure de propriétés élastiques et de densité : Application sur les oxydes de fer.

Abstract : The aim of the present work was to develop a new experimental apparatus which allows the measurement of elastic properties by ultrasonic wave propagation under extreme conditions in the Paris-Edinburgh press. A numerical modelling of the sample environment has been realised by finite element method and leads to an appropriate conception with minimum thermal gradients. The measurements of the ultrasonic velocity on magnetite with the new dedicated apparatus lead us to the determination of the three elastic moduli and of the density under high pressure (6 GPa) and temperature (100°C). Similar measurement on wüstite for the elastic modulus C11 has been realised (6 GPa; 200°C). The abnormal behaviour under pressure (12 GPa) of the shear moduli of wüstite C44 and C' has been measured by neutron scattering and interpreted as pre-transitional phenomena of the para-antiferromagnetical transition
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https://tel.archives-ouvertes.fr/tel-00189118
Contributor : Régis Debord <>
Submitted on : Tuesday, November 20, 2007 - 11:52:10 AM
Last modification on : Thursday, October 15, 2020 - 9:00:04 AM
Long-term archiving on: : Monday, April 12, 2010 - 2:47:02 AM

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  • HAL Id : tel-00189118, version 1

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Régis Debord. Développement d'une cellule haute pression haute température dans la presse Paris-Edimbourg pour la mesure de propriétés élastiques et de densité : Application sur les oxydes de fer.. Mécanique [physics.med-ph]. Université Pierre et Marie Curie - Paris VI, 2001. Français. ⟨tel-00189118⟩

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