Web of Science: 4 cites, Scopus: 3 cites, Google Scholar: cites
In-depth characterization of as-deposited and annealed Fe-W coatings electrodeposited from glycolate-citrate plating bath
Mulone, Antonio (Chalmers University of Technology)
Nicolenco, Aliona (Vilnius University)
Hoffmann, Volker (Leibniz Institute for Solid State and Materials Research Dresden)
Klement, U. (Chalmers tekniska högskola. Department of Materials and Manufacturing Technology)
Tsyntsaru, N. (Vilniaus Universitetas)
Cesiulis, H. (Vilniaus Universitetas)

Data: 2018
Resum: Fe-W coatings with 4, 16 and 24 at. % of W were electrodeposited under galvanostatic conditions from a new environmental friendly Fe(III)-based glycolate-citrate bath. This work aims to find correlations between composition including the light elements, internal structure of the electrodeposited Fe-W alloys and functional properties of material. The obtained alloys were characterized by Glow Discharge Optical Emission Spectrometry (GD-OES), Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray Spectroscopy (EDS), Transmission Electron Microscopy (TEM), and X-ray Diffraction (XRD). Compositional depth profiles of 10 μm thick coatings obtained by GD-OES show that the distribution of metals is uniform along the entire film thickness, while SEM imaging depicted the presence of cracks and O- and W-rich areas inside the Fe-W coating with 4 at. % W. In the samples with 16 and 24 at. % of W, oxygen and hydrogen are present mostly at the surface about 1 μm from the top while traces of carbon are distributed within the entire coatings. With increasing W content, the structure of the coatings changes from nanocrystalline to amorphous which was shown by XRD and TEM analysis. Also, the surface of coatings becomes smoother and brighter, that was explained based on the local adsorption of intermediates containing iron and tungsten species. Annealing experiments coupled with XRD analysis show that the thermal stability of Fe-W alloys increases when the W content increases, i. e. the coating with 24 at. % W retains the amorphous structure up to 600 °C, where a partially recrystallized structure was observed. Upon recrystallization of the amorphous samples the following crystalline phases are formed: α-Fe, Fe2W, Fe3W3C, Fe6W6C, and FeWO4. Hence, the Fe-W coatings with higher W content (>25 at. %) can be considered as suitable material for high temperature applications.
Nota: Número d'acord de subvenció EC/H2020/642642
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Llengua: Anglès.
Document: article ; recerca ; acceptedVersion
Matèria: Electrodeposition ; Tungsten alloys ; Iron alloys ; GD-OES ; Thermal stability
Publicat a: Electrochimica Acta, Vol. 261 (January 2018) , p. 167-177, ISSN 0013-4686

DOI: 10.1016/j.electacta.2017.12.051


Disponible a partir de: 2020-01-31
Postprint

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3)
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2019-04-08, darrera modificació el 2019-05-06



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