| Titre : |
Electrodeposited nickel-phosphorus (Ni-P) alloy coating : an in-depth study of its preparation, properties and structural transitions |
| Type de document : |
texte imprimé |
| Auteurs : |
Anju M. Pillai, Auteur ; A. Rajendra, Auteur ; A. K. Sharma, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 785-797 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Alliages nickel-phosphore
Dépôt électrolytique
Microstructures
Nanoindentation
Revêtement métallique
Traitement thermique
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Ni-P deposits with a phosphorus content of up to 20% (wt) were obtained on AA6061 substrates by direct current electrodeposition technique from a solution containing nickel sulfate, nickel chloride, phosphorous acid, phosphoric acid, and a wetting ageng (sodium lauryl sulfate). The effect of various plating parameters like current density, concentration of phosphorous acid, concentration of phosphoric acid and plating temperature on the P content of the coating as well as the rate of deposition was investigated systematically. It has been observed that the influence of current density on the P content of the deposit is largely dependent on the concentration of phosphorous acid in the plating bath. Composition, surface morphology, microstructure, and mechanical properties of the Ni-P deposits were studied using SEM, EDAX, XRD, and nanoindentation techniques. Ni-P electrodeposits with low P ocntent in the range of 4è7 wt% of P exhibited superior microhardness of 7.74-8.57 GPa. With increasing P content in the deposit, the structure undergoes transition from crystalline to nanocrystalline and becomes amorphous above 9.14 wt% of P. Ni-P alloys with some selected compositions were subjected to heat treatment at 400°C for 1h in a hot air oven and the resulting variation in mechanical properties was studied using nanoindentation technique. |
| Note de contenu : |
- Appearance
- Effect of plating parameters
- Effect of P content on the surface morphology of the coating
- Effect of P content on the microstructure of the coating
- Influence of plating parameters on the mechanical properties of the deposit
- Effect of heat treatment on the microstructure of the coating
- Effect of heat treatment on mechanical properties |
| DOI : |
10.1007/s11998-012-9411-0 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9411-0.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16664 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 785-797
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