NickelMaghrebV1, France, Analysis, bibRecord, 000147

Electrochemical synthesis of Ni-Sn alloys in molten LiCl-KCl

Identifieur interne : 000147 ( France/Analysis ); précédent : 000146; suivant : 000148

Electrochemical synthesis of Ni-Sn alloys in molten LiCl-KCl

Auteurs : H. El Ghallali [France, Maroc] ; H. Groult [France] ; A. Barhoun [Maroc] ; K. Draoui [Maroc] ; D. Krulic [France] ; F. Lantelme [France]

Source :

Electrochimica acta [ 0013-4686 ] ; 2009.

RBID : Pascal:09-0281462

Descripteurs français

Pascal (Inist)
- Potassium Chlorure, Nickel alliage, Etain alliage, Alliage binaire, Lithium Chlorure, Electrode, Sel fondu, Electrolyte fondu, Carbone, Etat vitreux, Dépôt électrolytique, Effet température, Diffraction RX, Microscopie électronique balayage, Réaction électrochimique, Structure surface, Morphologie, Condition opératoire.
Wicri :
- topic : Carbone.

English descriptors

KwdEn :
- Binary alloy, Carbon, Electrochemical reaction, Electrodeposition, Electrodes, Glassy state, Lithium Chlorides, Molten electrolyte, Molten salt, Morphology, Nickel alloy, Operating conditions, Potassium Chlorides, Scanning electron microscopy, Surface structure, Temperature effect, Tin alloy, X ray diffraction.

Abstract

The electrochemical formation of Ni-Sn was investigated in molten LiCl-KCl in the temperature range 380-580°C. Before, an electrochemical study of the Ni²⁺/Ni⁰, Sn⁴⁺/Sn²⁺ and Sn²⁺/Sn⁰ redox couples was performed by cyclic voltametry and chronopotentiometry in a wide temperature range. It had been pointed out that in the case of the Sn⁴⁺/Sn²⁺ redox couple, an insoluble compound is probably formed for T<460°C. For higher temperature, this compound becomes soluble and then, the shape of the cyclic voltammogram is analogue to the one usually observed when a diffusion-controlled process is involved. The diffusion coefficient values of Ni²⁺ and Sn²⁺ ions were determined. For instance, D_Ni(II) and D_Sn(II) values deduced from chronopotentiometry were about 2.1 x 10^-5 and 2.7 × 10^-5 cm² s^-1 at 440 °C, respectively. Then, Ni-Sn alloys have been formed in potentiostatic mode. The electrochemical route proposed in this paper leads to the formation of crystallized alloys with a well-defined composition depending on the operating conditions.

Affiliations:

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Le document en format XML

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<term>Electrochemical reaction</term>
<term>Electrodeposition</term>
<term>Electrodes</term>
<term>Glassy state</term>
<term>Lithium Chlorides</term>
<term>Molten electrolyte</term>
<term>Molten salt</term>
<term>Morphology</term>
<term>Nickel alloy</term>
<term>Operating conditions</term>
<term>Potassium Chlorides</term>
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<term>Temperature effect</term>
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<term>X ray diffraction</term>
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<term>Nickel alliage</term>
<term>Etain alliage</term>
<term>Alliage binaire</term>
<term>Lithium Chlorure</term>
<term>Electrode</term>
<term>Sel fondu</term>
<term>Electrolyte fondu</term>
<term>Carbone</term>
<term>Etat vitreux</term>
<term>Dépôt électrolytique</term>
<term>Effet température</term>
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<front><div type="abstract" xml:lang="en">The electrochemical formation of Ni-Sn was investigated in molten LiCl-KCl in the temperature range 380-580°C. Before, an electrochemical study of the Ni<sup>2+</sup>
/Ni<sup>0</sup>
, Sn<sup>4+</sup>
/Sn<sup>2+</sup>
 and Sn<sup>2+</sup>
/Sn<sup>0</sup>
 redox couples was performed by cyclic voltametry and chronopotentiometry in a wide temperature range. It had been pointed out that in the case of the Sn<sup>4+</sup>
/Sn<sup>2+</sup>
 redox couple, an insoluble compound is probably formed for T<460°C. For higher temperature, this compound becomes soluble and then, the shape of the cyclic voltammogram is analogue to the one usually observed when a diffusion-controlled process is involved. The diffusion coefficient values of Ni<sup>2+</sup>
 and Sn<sup>2+</sup>
 ions were determined. For instance, D<sub>Ni(II)</sub>
 and D<sub>Sn(II)</sub>
 values deduced from chronopotentiometry were about 2.1 x 10<sup>-5</sup>
 and 2.7 × 10<sup>-5</sup>
 cm<sup>2</sup>
 s<sup>-1</sup>
 at 440 °C, respectively. Then, Ni-Sn alloys have been formed in potentiostatic mode. The electrochemical route proposed in this paper leads to the formation of crystallized alloys with a well-defined composition depending on the operating conditions.</div>
</front>
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<name sortKey="Lantelme, F" sort="Lantelme, F" uniqKey="Lantelme F" first="F." last="Lantelme">F. Lantelme</name>
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Electrochemical synthesis of Ni-Sn alloys in molten LiCl-KCl

Electrochemical synthesis of Ni-Sn alloys in molten LiCl-KCl

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri