Szczegóły publikacji
Opis bibliograficzny
Electrodeposition and properties of nanocrystalline $Ni-based$ alloys with refractory metal from citrate baths — Elektroosadzanie i właściwości nanokrystalicznych stopów na osnowie niklu z trudnotopliwym metalem z kąpieli cytrynianowych / A. Bigos, E. Bełtowska-Lehman, P. Indyka, M. J. Szczerba, M. KOT, M. Grobelny // Archives of Metallurgy and Materials / Polish Academy of Sciences. Committee of Metallurgy. Institute of Metallurgy and Materials Science ; ISSN 1733-3490. — 2013 — vol. 58 iss. 1, s. 247–253. — Bibliogr. s. 253
Autorzy (6)
- Bigos Agnieszka
- Bełtowska-Lehman E.
- Indyka P.
- Szczerba Maciej Jakub
- AGHKot Marcin
- Grobelny M.
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 73064 |
|---|---|
| Data dodania do BaDAP | 2013-04-16 |
| DOI | 10.2478/v10172-012-0181-6 |
| Rok publikacji | 2013 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Archives of Metallurgy and Materials |
Abstract
The main aim of the present work was to determine the optimal conditions for electrodeposition of metallic Ni-Mo coatings of enhanced micromechanical properties. These alloys were electrodeposited on the ferritic steel substrate, under galvanostatic regime in a system with a rotating disk electrode (RDE), from an aqueous citrate complex solution containing nickel and molybdenum salts. The effect of the electrolyte solution pH (adjusted by sulphuric acid or ammonia) on the molybdenum content and on deposit quality as well as on the current efficiency of the electrodeposition process, has been studied. It was established that increase of bath pH is correlated with gradual increase of molybdenum content in deposits up to pH 7, where the maximum concentration of Mo(VI) electroactive citrate complex ions [MoO4(Cit)H](4-) (Cit=C6H5O73-) in plating bath was observed. In the selected bath of the optimum pH value, the effect of cathodic current density, as a crucial operating parameter which strongly controls the chemical composition and microstructure parameters (e.g. phase compositions, crystallite size), on the mechanical and tribological properties of the resulting coatings has been determined. It has been shown that - under all investigated current density range - crack-free, well adherent Ni-Mo coatings, characterized by microhardness of 6.5-7.8 GPa, were obtained. Alloys deposited at higher tested current densities (above 3.5 A/dm(2)) were characterized by compact and uniform microstructure, and thus had the highest wear and friction resistance.
