%0 Journal Article
%T Anomalous thermal expansion of γ -iron nanocrystals inside multiwalled carbon nanotubes
%+ Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257)
%+ Laboratoire Charles Coulomb (L2C)
%+ Laboratoire de Physique des Solides (LPS)
%+ Laboratoire Francis PERRIN (LFP - URA 2453)
%+ Synchrotron SOLEIL (SSOLEIL)
%+ Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI)
%A Cambedouzou, J.
%A Landois, Perine
%A Rouzière, Stéphan
%A Pinault, Mathieu
%A Mocuta, Cristian
%A Hennet, Louis
%A Thiaudière, Dominique
%A Mayne-L'Hermite, Martine
%A Launois, Pascale
%< avec comité de lecture
%Z L2C:13-400
%@ 1098-0121
%J Physical Review B: Condensed Matter and Materials Physics (1998-2015)
%I American Physical Society
%V 88
%P 081402(R)
%8 2013-08-08
%D 2013
%R 10.1103/PhysRevB.88.081402
%Z PACS : 61.05.cp, 61.46.−w, 65.40.De
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
%Z Chemical Sciences/Theoretical and/or physical chemistryJournal articles
%X The thermal expansion of α-Fe (ferrite) and γ -Fe (austenite) nanocrystals confined inside multiwalled carbon nanotubes (MWCNTs) is studied in situ, using synchrotron x-ray diffraction, as a function of temperature. While the thermal expansion of ferrite is similar to that of bulk material, a peculiar behavior is evidenced for austenite: The thermal expansion becomes abnormally high above 500 ◦C. A scenario involving progressive carbon uptake in γ -Fe nanocrystals gives a satisfactory understanding of the phenomenon, and allows one to propose a value of the carbon solubilization rate in γ -Fe particles confined inside MWCNTs.
%G English
%L hal-01339478
%U https://hal.science/hal-01339478
%~ CEA
%~ CNRS
%~ UNIV-ORLEANS
%~ UNIV-PSUD
%~ ENSC-MONTPELLIER
%~ CEMHTI
%~ LFP-CEA
%~ ICSM
%~ L2C
%~ DEN
%~ INC-CNRS
%~ IRAMIS-LIDYL
%~ UNIV-PARIS-SACLAY
%~ UNIV-PSUD-SACLAY
%~ SYNCHROTRON-SOLEIL
%~ MIPS
%~ CHIMIE
%~ UNIV-MONTPELLIER
%~ DEN-MARCO
%~ IRAMIS
%~ GS-PHYSIQUE
%~ LPSO
%~ URP-LPS
%~ UM-2015-2021
%~ TEST2-HALCNRS