Szczegóły publikacji
Opis bibliograficzny
Studies on electrochemical deposition and physicochemical properties of nanocrystalline ${Ni-Mo}$ alloys / Agnieszka Bigos, Ewa Beltowska-Lehman, Marcin KOT // Surface and Coatings Technology ; ISSN 0257-8972. — 2017 — vol. 317, s. 103–109. — Bibliogr. s. 109, Abstr. — Publikacja dostępna online od: 2017-03-18
Autorzy (3)
- Bigos Agnieszka
- Beltowska-Lehman Ewa
- AGHKot Marcin
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 105313 |
|---|---|
| Data dodania do BaDAP | 2017-05-25 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.surfcoat.2017.03.036 |
| Rok publikacji | 2017 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Surface & Coatings Technology |
Abstract
Nanocystalline Ni-Mo coatings were deposited from citrate-ammonia solution, in a model system with a rotating disc electrode (RDE) using low carbon steel discs as the cathode. The effect of parameters such as electrolyte solution pH (from 4 to 10), temperature (from 20 degrees C to 60 degrees C), and hydrodynamic conditions (RDE speed in the range of 0 to 640 rpm) on chemical and phase composition, microstructure, average crystallite size of coatings and current efficiency of electrodeposition was investigated. It was confirmed that, in the induced co-deposition process, molybdenum acts as a grain refinement modifier. This, apart from influencing changes in surface morphology, has a significant effect on the mechanical properties of the layers. For alloys containing less than 16 wt% of Mo (related to the crystallite size of 7 nm) loss of strengthening effect (the inverse Hall-Petch relationship) was observed, which was correlated with the decrease in coatings' resistance to wear. Hence, for electrode position nanocrystalline Ni-Mo alloys characterised by high microhardness, good resistance to wear and adhesion to the steel substrate, the suitable conditions for electrolysis were determined. These conditions include: electrolyte solution pH above 7, plating temperature in the range of 20 degrees C to 40 degrees C, and hydrodynamic conditions corresponding to the RDE speed of 260 to 640 rpm. (C) 2017 Elsevier B.V. All rights reserved.
