We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Microstructure and Properties of Electrodeposited Nanocrystalline Ni-Co-Fe Coatings.
- Authors
Ledwig, Piotr; Kac, Malgorzata; Kopia, Agnieszka; Falkus, Jan; Dubiel, Beata
- Abstract
Materials based on Ni-Co-Fe alloys, due to their excellent magnetic properties, attract great attention in nanotechnology, especially as candidates for high-density magnetic recording media and other applications from spintronic to consumer electronics. In this study, Ni-Co-Fe nanocrystalline coatings were electrodeposited from citrate-sulfate baths with the Ni2+:Co2+:Fe2+ ion concentration ratios equal to 15:1:1, 15:2:1, and 15:4:1. The effect of the composition of the bath on the morphology, microstructure, chemical composition, microhardness, and magnetic properties of the coatings was examined. Scanning (SEM) and transmission (TEM) electron microscopy, X-ray diffractometry (XRD), and energy dispersive X-ray spectroscopy (EDS) were used to study surface morphology, microstructure, chemical, and phase composition. Isothermal cross-sections of the Ni-Co-Fe ternary equilibrium system for the temperature of 50 °C and 600 °C were generated using the FactSage package. Magnetic properties were analyzed by a superconducting quantum interference device magnetometer (SQUID). All the coatings were composed of a single phase being face-centered cubic (fcc) solid solution. They were characterized by a smooth surface with globular morphology and a nanocrystalline structure of grain diameter below 30 nm. It was determined that Ni-Co-Fe coatings exhibit high hardness above 4.2 GPa. The measurements of hysteresis loops showed a significant value of magnetization saturation and small coercivity. The microstructure and properties of the obtained nanocrystalline coatings are interesting in terms of their future use in micromechanical devices (MEMS).
- Subjects
SUPERCONDUCTING quantum interference devices; MAGNETIC recording media; ENERGY dispersive X-ray spectroscopy; MICROELECTROMECHANICAL systems; SURFACE coatings
- Publication
Materials (1996-1944), 2021, Vol 14, Issue 14, p3886
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma14143886