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References

2016

Articles:

Turgis, R., Arrachart, G., Dubois, V., Dourdain, S., Virieux, D., Michel, S., Legeai, S., Lejeune, M., Draye, M. and Pellet-Rostaing, S.
Dalton Transactions, 45(Copyright (C) 2016 American Chemical Society (ACS). All Rights Reserved.):1259-1268
2016

Resume: The extn. of rare earth elements (REEs) from nitric acid soln. with a triphosphine trioxide (TPO) is presented. Performances of such a ligand in ionic liqs. vs. a classical solvent (benzyl ether) are compared. TPO seems to be 10 to 100 times more efficient when it is dissolved in ionic media whatever the concn. of nitric acid involved. Mechanistic investigations reveal that cation exchange classically obsd. in ionic liqs. is not consistent with the exptl. data. Moreover, clear differences in the TPO/Ln complexes between classical and ionic media are highlighted. A stable complex of 1 lanthanide for 3 TPO is formed in an ionic liq. whereas a complex of 1 lanthanide for 6 to 9 TPO is formed in benzyl ether. Back extn. is also studied and good recovery of REEs could be obtained. The TPO/ionic liq. system shows remarkable performances i.e. efficiency and selectivity towards lanthanides in a simulated leaching soln. of a Nd/Fe/B/Dy magnet. [on SciFinder(R)]

Equipe: Département CP2S : Chimie et électrochimie des matériaux

2014

Articles:

Meglali, O., Attaf, N., Bouraiou, A., Bougdira, J. and Aida, M.S.
Journal of Alloys and Compounds, 587:303-307
2014

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Villaseca, Sebastian Alarcon, Kandaskalov, Dmytro, Gaudry, Emilie and Armbruester, Marc
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 640(5, SI):753-759
2014
ISSN: 0044-2313

Equipe: Département CP2S : Métallurgie et Surfaces

ZHOU, T., COLIN, M., CANDOLFI, C., Boulanger, C., DAUSCHER, A., Santava, E., HEJTMANEK, J., BARANEK, P., AL RAHAL AL ORABI, R., POTEL, M., Fontaine, B., GOUGEON, P., Gautier, R. and LENOIR, B.
Chemistry of Materials, 26(16):4765-4775
2014

Resume: We present a detailed study of the evolution of the electrical, galvanomagnetic, and thermodynamic properties of polycrystalline AgxMo9Se11 compounds for 3.4 ? x ? 3.8 at low temperatures (2?350 K). In agreement with density functional theory calculations, the collected data show an overall gradual variation in the transport properties from metallic to semiconducting behavior on going from x = 3.4 to 3.8. The results evidence subtle variations in the electronic properties with the Ag content, typified by both positive and negative phonon-drag effects together with thermopower and Hall coefficient of opposite signs. Analysis of the data suggests that these features may be due to peculiarities of the dispersion of the valence bands in the vicinity of the chemical potential. A drastic influence of the Ag content on the thermal transport was evidenced by a pronounced change in the temperature dependence of the specific heat below 10 K. Nonlinearities in the Cp(T3) data are correlated to the concentration of Ag atoms, with an increase in x resulting in a more pronounced departure from a Debye law. The observed behavior mirrors that of ionic conductors, suggesting that AgxMo9Se11 for x ? 3.6 might belong to this class of compounds.

Equipe: Département CP2S : Chimie et électrochimie des matériaux

Altaweel, A., Filipic, G., Gries, T. and Belmonte, T.
Journal of Crystal Growth, 407:17-24
2014

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Messaoudi, M., S. Aida, M., Attaf, N., Bezzi, T., Bougdira, J. and Medjahdi, G.
Materials Science in Semiconductor Processing, 17:38-42
2014

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Kuete Saa, D., Cardoso, R.P., Kosior, F., Altaweel, A., Gries, T., Laminsi, S. and Belmonte, T.
Surface and Coatings Technology, 255:3-7
2014

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Samih, Y., Marcos, G., Stein, N., Allain, N., Fleury, E., Dong, C. and Grosdidier, T.
Surface and Coatings Technology,
2014

Mots clefs: High Current Pulsed Electron Beam Treatment (HCPEB) Surface hardening Corrosion Phase selection Phase transformation Martensitic steel

Resume: Abstract The surface of the AISI 420 martensitic stainless steel was subjected to High Current Pulsed Electron Beam (HCPEB) treatment. The microstructure in the melted layer consisted of a three phase mixture: (i) fine ?-Fe grains formed via epitaxial growth from the substrate, (ii) larger ?–grains nucleated from the top surface of the melt and (iii) some needles-like variants issued from the solid state martenitic transformation. Despite this complex multi-phase microstructure, the corrosion performance, tested in a sulfuric acid solution, was significantly enhanced by the HCPEB treatment. The increase in corrosion potential and delayed pitting are essentially attributed to an increase in Cr content, rising from 13.3 wt. % in the bulk to about 14 wt. % at the surface, together with a very limited amount of surface craters. This low density of craters did not give rise to significant deep hardening in the sub-surface but the top surface melted layer hardness was increased by more than 50% because of the triggering of the martensitic transformation.

Equipe: Département CP2S : Chimie et électrochimie des matériaux

Samih, Y., Marcos, G., Stein, N., Allain, N., Fleury, E., Dong, C. and Grosdidier, T.
Surface and Coatings Technology, 259:737-745
2014

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Li, H. I., Abreu, G. J. P., SHUKLA, A. K., Fournee, V., Ledieu, J., Loli, L. N. Serkovic, Rauterkus, S. E., Snyder, M. V., Su, S. Y., Marino, K. E. and DIEHL, R. D.
PHYSICAL REVIEW B, 89(8)
2014
ISSN: 1098-0121

Equipe: Département CP2S : Métallurgie et Surfaces

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