Electroplating of Ni4W
نویسندگان
چکیده
Nickel-tungsten alloys were electrodeposited on stationary working electrodes from a nickel sulfate, sodium tungstate, and tri-sodium citrate-based bath under different operating conditions. The microstructure of the deposits was studied by X-ray diffraction, the morphology by scanning electron microscopy and atomic force microscopy, and the approximate composition by energy dispersive spectroscopy. Different Ni-W phases, either amorphous or crystalline, were associated with different plating conditions. A body-centered tetragonal Ni4W phase was formed only at high temperatures and low current density. This is the first time that the formation of this phase by electroplating was observed repeatedly. © 2005 The Electrochemical Society. @DOI: 10.1149/1.1857114# All rights reserved.
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