Open AccessMorphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders
Author(s) -
M. Spasojević,
Sinisa Randjic,
A. Maričić,
Tomislav Trišović,
M. Spasojević
Publication year - 2020
Publication title -
science of sintering/science of sintering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 25
eISSN - 1820-7413
pISSN - 0350-820X
DOI - 10.2298/sos2001109s
Subject(s) - materials science , alloy , magnetization , metallurgy , nanocrystal , annealing (glass) , amorphous solid , current density , dendrite (mathematics) , chemical engineering , analytical chemistry (journal) , nanotechnology , crystallography , magnetic field , chemistry , physics , geometry , mathematics , quantum mechanics , engineering , chromatography
Nanostructured Ni-Fe-W-Cu alloy powders were electrodeposited from an alkaline ammonium citrate solution on a titanium cathode. Powder particles were dendrite- and cauliflower-shaped. The dendritic particles had a high density of branches made up of interconnected globules. XRD analysis showed that the powder contained an amorphous matrix and FCC nanocrystals of the solid solution of Fe, W and Cu in Ni. As the deposition current density increased, the mean nanocrystal size decreased, and the mean value of internal microstrain and the total weight percent of Fe and Ni in the alloy increased. The powders deposited at higher current densities exhibited higher magnetization. During annealing at temperatures up to 460?C, the powders underwent short-range ordering, which caused an increase in magnetization, whereas at temperatures above 460?C, the magnetization decreased due to the formation of large FCC crystalline grains.