Title :

Rheology of amorphous olivine thin films characterized by nanoindentation

Author(s) :

Baral, Paul [Auteur]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Orekhov, Andrey [Auteur]
Dohmen, Ralf [Auteur]
Coulombier, Michaël [Auteur]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Raskin, Jean Pierre [Auteur]
Institute of Information and Communication Technologies, Electronics and Applied Mathematics [ICTEAM]
Cordier, Patrick [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Idrissi, Hosni [Auteur]
Electron Microscopy for Materials Science - EMAT (Antwerp, Belgium)
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]
Pardoen, Thomas [Auteur]
Institute of Mechanics, Materials and Civil Engineering [Louvain] [IMMC]

Journal title :

Acta Materialia

Abbreviated title :

Acta Materialia

Volume number :

219

Pages :

117257

Publisher :

Elsevier BV

Publication date :

2021-10

ISSN :

1359-6454

HAL domain(s) :

Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Planète et Univers [physics]/Sciences de la Terre

English abstract : [en]

The rheological properties of amorphous olivine thin films deposited by pulsed laser deposition have been studied based on ambient temperature nanoindentation under constant strain-rate and relaxation conditions. The ...
Show more >The rheological properties of amorphous olivine thin films deposited by pulsed laser deposition have been studied based on ambient temperature nanoindentation under constant strain-rate and relaxation conditions. The amorphous olivine films exhibit a viscoelastic-viscoplastic behavior with a significant rate dependency. The strain-rate sensitivity m is equal to ~0.06 which is very high for silicates, indicating a complex out-of-equilibrium structure. The minimum apparent activation volume determined from nanoindentation experiments corresponds to Mg and Fe metallic sites in the (Mg,Fe)2SiO4 crystalline lattice. The ambient temperature creep behavior of the amorphous olivine films differs very much from the one of single crystal olivine. This behavior directly connects to the recent demonstration of the activation of grain boundary sliding in polycrystalline olivine following grain boundary amorphization under high-stress.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

European Project :

Rheology of Earth materials: closing the gap between TIMEscales in the laboratory and in the MANtle

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Plasticité

Submission date :

2021-10-25T12:59:58Z
2021-10-26T09:37:45Z