NickelMaghrebV1, Main, Exploration, bibRecord, 000D31

Thermal effects of a laser beam on the electrodeposition of Ni-P alloys

Identifieur interne : 000D31 ( Main/Exploration ); précédent : 000D30; suivant : 000D32

Thermal effects of a laser beam on the electrodeposition of Ni-P alloys

Auteurs : I. Zouari [France, Tunisie] ; A. Bellagi [Tunisie] ; François Lapicque [France]

Source :

Journal of applied electrochemistry [ 0021-891X ] ; 1998.

RBID : Pascal:98-0109448

Descripteurs français

Pascal (Inist)
- Dépôt électrolytique, Revêtement métallique, Densité courant, Effet température, Microstructure, Laser pulsé, Laser continu, Hypophosphite, Composition chimique, Alliage base nickel, Traitement surface, Acétate, Phosphore alliage, Alliage NiP, Ni P.

English descriptors

KwdEn :
- Acetate, CW laser, Chemical composition, Current density, Electrodeposition, Hypophosphites, Metal coating, Microstructure, Nickel base alloys, Phosphorus alloys, Pulsed laser, Surface treatment, Temperature effect.

Abstract

The paper deals with the effects of an incident laser beam on electrodeposition of Ni-P alloys from dilute acetate solutions. The kinetics of separate reductions of Ni²⁺ and H₂PO^-₂ species were first investigated by linear sweep voltammetry, varying the hypophosphite concentration and the solution temperature: comparison of the kinetically limited current densities of the two reductions suggested that increasing temperature might reduce the significance of P codeposition. This tendency was confirmed by deposition runs carried out at controlled current. Deposition performance was discussed in terms of faradaic yield and deposit properties, namely P content together with the aspect and the structure of the alloys. Use of a continuous or pulsed laser beam was shown to reduce the P content in the deposit at high current densities; in some cases, amorphous structures were replaced by more crystalline forms with assistance of a laser beam.

Affiliations:

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

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Le document en format XML

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<term>Current density</term>
<term>Electrodeposition</term>
<term>Hypophosphites</term>
<term>Metal coating</term>
<term>Microstructure</term>
<term>Nickel base alloys</term>
<term>Phosphorus alloys</term>
<term>Pulsed laser</term>
<term>Surface treatment</term>
<term>Temperature effect</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Dépôt électrolytique</term>
<term>Revêtement métallique</term>
<term>Densité courant</term>
<term>Effet température</term>
<term>Microstructure</term>
<term>Laser pulsé</term>
<term>Laser continu</term>
<term>Hypophosphite</term>
<term>Composition chimique</term>
<term>Alliage base nickel</term>
<term>Traitement surface</term>
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<front><div type="abstract" xml:lang="en">The paper deals with the effects of an incident laser beam on electrodeposition of Ni-P alloys from dilute acetate solutions. The kinetics of separate reductions of Ni<sup>2+</sup>
 and H<sub>2</sub>
PO<sup>-</sup>
<sub>2</sub>
 species were first investigated by linear sweep voltammetry, varying the hypophosphite concentration and the solution temperature: comparison of the kinetically limited current densities of the two reductions suggested that increasing temperature might reduce the significance of P codeposition. This tendency was confirmed by deposition runs carried out at controlled current. Deposition performance was discussed in terms of faradaic yield and deposit properties, namely P content together with the aspect and the structure of the alloys. Use of a continuous or pulsed laser beam was shown to reduce the P content in the deposit at high current densities; in some cases, amorphous structures were replaced by more crystalline forms with assistance of a laser beam.</div>
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Thermal effects of a laser beam on the electrodeposition of Ni-P alloys

Thermal effects of a laser beam on the electrodeposition of Ni-P alloys

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri