synthesis and characterizations of ni-w alloy

The nickel tungsten (ni-w) alloy was electrodeposited on stainless steel (ss) substrate using potentiostatic mode at room temperature. potentiostatic electrodeposition was carried out by varying the deposition time. the physicochemical properties of ni-w alloys were studied using x-ray diffraction (xrd), electron microscopy and micro-raman spectroscopy. recorded xrd spectra was compared with standard jcpds card and the presence of ni was confirmed, no such peaks for w were observed. further study was extended for micro-raman analysis. from raman spectroscopy study the appearance of ni-o and w6+=o bonds confirms that the ni-w present in amorphous phase. several cracks were observed in sem images along with nanoparticles distributed over the electrode surface. the appearance of cracks may be correlated with the in-plane tensile stresses, lattice strains and stacking faults and may be related to the substrate confinements.