Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/50976
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Grain Boundary Segregation and Interdiffusion Effects in Nickel–Copper Alloys: An Effective Means to Improve the Thermal Stability of Nanocrystalline Nickel |
Autor: | Pellicer, Eva CSIC ORCID; Varea, Aïda; Suriñach, Santiago; Baró, María Dolors; Nogués, Josep CSIC ORCID; Sort, Jordi CSIC ORCID | Fecha de publicación: | 2011 | Editor: | American Chemical Society | Citación: | ACS Applied Materials and Interfaces 3(7): 2265-2274 (2011) | Resumen: | Nanocrystalline (nc) Ni films show pronounced grain growth and suffer from concomitant deterioration of their mechanical and magnetic properties after annealing at relatively low temperatures (TANN ≥ 475 K). This constitutes a drawback for their applicability as coatings or in components of miniaturized devices. This work reveals that the thermal stability of nc Ni is significantly improved by controllably alloying Ni with Cu, by means of electrodeposition, to form a Ni1-xCux solid solution. To tune the composition of such nc alloys, Ni1-xCux films are deposited galvanostatically using an electrolytic bath containing Ni and Cu sulfate salts as electroactive species, saccharine as grain-refining agent, and applying current densities ranging from -10 to -40 mA cm-2. The enhanced thermal stability is ascribed to segregation of a Cu-rich phase at the Ni1-xCux grain boundaries, which acts as a shielding layer against grain growth. As a result, high values of hardness (in excess of 6 GPa) remain in nc Ni1-xCux for x ≥ 0.3, even after annealing at TANN ≥ 575 K. From a magnetic point of view, Ni 1-xCux films possess lower coercivity values than pure nc Ni films, both in the as-prepared and annealed states, thus offering potential advantages for certain soft magnetic applications. © 2011 American Chemical Society. | URI: | http://hdl.handle.net/10261/50976 | DOI: | 10.1021/am2004587 | Identificadores: | doi: 10.1021/am2004587 issn: 1944-8244 |
Aparece en las colecciones: | (CIN2) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
64
checked on 17-abr-2024
WEB OF SCIENCETM
Citations
60
checked on 24-feb-2024
Page view(s)
323
checked on 19-abr-2024
Download(s)
95
checked on 19-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.