Deformation of NaCoF3 perovskite and ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
URL permanente :
Titre :
Deformation of NaCoF3 perovskite and post-perovskite up to 30 GPa and 1013 K: implications for plastic deformation and transformation mechanism
Auteur(s) :
Gay, Jeffrey-Phillip [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Miyagi, Lowell [Auteur]
University of Utah
Couper, Samantha [Auteur]
University of Utah
Langrand, Christopher [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Dobson, David P. [Auteur]
University College of London [London] [UCL]
Liermann, Hanns-Peter [Auteur]
Deutsches Elektronen-Synchrotron [Hamburg] [DESY]
Merkel, Sébastien [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Unité Matériaux et Transformations (UMET) - UMR 8207
Miyagi, Lowell [Auteur]
University of Utah
Couper, Samantha [Auteur]
University of Utah
Langrand, Christopher [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Dobson, David P. [Auteur]
University College of London [London] [UCL]
Liermann, Hanns-Peter [Auteur]
Deutsches Elektronen-Synchrotron [Hamburg] [DESY]
Merkel, Sébastien [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Unité Matériaux et Transformations (UMET) - UMR 8207
Titre de la revue :
European Journal of Mineralogy
Nom court de la revue :
Eur. J. Mineral.
Numéro :
33
Pagination :
591-603
Éditeur :
Copernicus Publications
Date de publication :
2021-09-30
ISSN :
0935-1221
Discipline(s) HAL :
Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Physique [physics]/Géophysique [physics.geo-ph]
Physique [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Sciences de la Terre
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Physique [physics]/Géophysique [physics.geo-ph]
Physique [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Sciences de la Terre
Résumé en anglais : [en]
Texture, plastic deformation, and phase transformation
mechanisms in perovskite and post-perovskite are of general interest for our
understanding of the Earth's mantle. Here, the perovskite analogue
NaCoF3 is deformed ...
Lire la suite >Texture, plastic deformation, and phase transformation mechanisms in perovskite and post-perovskite are of general interest for our understanding of the Earth's mantle. Here, the perovskite analogue NaCoF3 is deformed in a resistive-heated diamond anvil cell (DAC) up to 30 GPa and 1013 K. The in situ state of the sample, including crystal structure, stress, and texture, is monitored using X-ray diffraction. A phase transformation from a perovskite to a post-perovskite structure is observed between 20.1 and 26.1 GPa. Normalized stress drops by a factor of 3 during transformation as a result of transient weakening during the transformation. The perovskite phase initially develops a texture with a maximum at 100 and a strong 010 minimum in the inverse pole figure of the compression direction. Additionally, a secondary weaker 001 maximum is observed later during compression. Texture simulations indicate that the initial deformation of perovskite requires slip along (100) planes with significant contributions of {110} twins. Following the phase transition to post-perovskite, we observe a 010 maximum, which later evolves with compression. The transformation follows orientation relationships previously suggested where the c axis is preserved between phases and hh0 vectors in reciprocal space of post-perovskite are parallel to [010] in perovskite, which indicates a martensitic-like transition mechanism. A comparison between past experiments on bridgmanite and current results indicates that NaCoF3 is a good analogue to understand the development of microstructures within the Earth's mantle.Lire moins >
Lire la suite >Texture, plastic deformation, and phase transformation mechanisms in perovskite and post-perovskite are of general interest for our understanding of the Earth's mantle. Here, the perovskite analogue NaCoF3 is deformed in a resistive-heated diamond anvil cell (DAC) up to 30 GPa and 1013 K. The in situ state of the sample, including crystal structure, stress, and texture, is monitored using X-ray diffraction. A phase transformation from a perovskite to a post-perovskite structure is observed between 20.1 and 26.1 GPa. Normalized stress drops by a factor of 3 during transformation as a result of transient weakening during the transformation. The perovskite phase initially develops a texture with a maximum at 100 and a strong 010 minimum in the inverse pole figure of the compression direction. Additionally, a secondary weaker 001 maximum is observed later during compression. Texture simulations indicate that the initial deformation of perovskite requires slip along (100) planes with significant contributions of {110} twins. Following the phase transition to post-perovskite, we observe a 010 maximum, which later evolves with compression. The transformation follows orientation relationships previously suggested where the c axis is preserved between phases and hh0 vectors in reciprocal space of post-perovskite are parallel to [010] in perovskite, which indicates a martensitic-like transition mechanism. A comparison between past experiments on bridgmanite and current results indicates that NaCoF3 is a good analogue to understand the development of microstructures within the Earth's mantle.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Références liée(s) :
Projet ANR :
Établissement(s) :
Université de Lille
CNRS
INRA
ENSCL
CNRS
INRA
ENSCL
Collections :
Équipe(s) de recherche :
Matériaux Terrestres et Planétaires
Date de dépôt :
2021-10-04T16:29:58Z
2021-10-06T08:20:27Z
2021-10-06T08:20:27Z
Fichiers
- Gay et al. (2021) EJM.pdf
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