Smart design of porous Ni and Ni-W films with tunable mechanical and magnetic performance
de Paz Castany, Roger (Universitat Autònoma de Barcelona. Departament de Física)
López-Pintó, Nicolau (Universitat Autònoma de Barcelona. Departament de Física)
Eiler, Konrad (Universitat Autònoma de Barcelona. Departament de Física)
Stenning, Gavin B.G. (ISIS Neutron and Muon Source)
Hubin, Annick (Vrije Universiteit Brussel)
Pellicer Vilà, Eva Maria (Universitat Autònoma de Barcelona. Departament de Física)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)

Data:	2025
Resum:	Dense and porous Ni and Ni-W alloy films were fabricated via electrodeposition, with the porous structures produced using colloidal crystal templates composed of 20 and 200 nm polystyrene spheres. The study investigates the effects of tungsten content (6-9 wt%) and porosity on the films' mechanical and magnetic properties, as well as their structural stability at elevated temperatures. From a crystallographic viewpoint, both Ni and Ni-W films exhibited a face-centered cubic (fcc) structure, with the diffraction peaks of the Ni-W films shifted toward lower angles due to the alloying of W with Ni. Interestingly, peak splitting was observed in the porous films, which originated from the confined metal growth between the polystyrene spheres. All films were nanocrystalline, with crystallite sizes in the range of 17 - 46 nm. Tungsten addition to nickel enhanced mechanical hardness but decreased magnetic moment and Curie temperature. Porosity, on the other hand, introduced new magnetic contributions not observed in dense films, including superparamagnetic behavior in the Ni-W films with 200 nm-size porosity. Thermal analysis revealed that the porous Ni-W films were morphologically stable up to 800 K, whereas porosity in pure Ni films degraded at 600 K. These findings highlight the potential of Ni-W coatings with tailored porosity for magnetic microelectromechanical systems and sustainable multi-functional coatings.
Ajuts:	European Commission 101058076 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00651 Agencia Estatal de Investigación PID2020-116844RB-C21
Nota:	Altres ajuts: acords transformatius de la UAB
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.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Nickel-tungsten films ; Electrodeposition ; Colloidal crystal templating ; Nanoindentation ; Curie temperature ; Thermal stability
Publicat a:	Journal of alloys and compounds, Vol. 1046 (November 2025) , art. 184863, ISSN 0925-8388
Obra relacionada:	de Paz Castany, Roger; Lopez Pinto, Nicolau; Eiler, Konrad; Stenning, Gavin; Hubin, Annick; Pellicer, Eva; Sort, Jordi, 2025, "Replication Data for: Smart design of porous Ni and Ni-W films with tunable mechanical and magnetic performance", CORA.Repositori de Dades de Recerca https://doi.org/10.34810/data2743

DOI: 10.1016/j.jallcom.2025.184863

10 p, 6.5 MB

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