Synthesis, Structure and Properties of Nickel-Iron-Tungsten Alloy Electrodeposits PART I: Effect of Synthesis Parameters on Chemical Composition, Microstructure and Morphology

  • Nataša Ćirović Faculty of Technology and Metallurgy, University of Belgrade
  • Pavle Spasojević Faculty of Technology and Metallurgy, University of Belgrade; Joint Laboratory for Advanced Materials of SASA, Section for Amorphous Systems, Faculty of Technical Sciences, Čačak, University of Kragujevac
  • Lenka Ribić-Zelenović Faculty of Agronomy, Čačak, University of Kragujevac
  • P. Mašković Faculty of Agronomy, Čačak, University of Kragujevac
  • Miroslav Spasojević Faculty of Agronomy, Čačak, University of Kragujevac; Joint Laboratory for Advanced Materials of SASA, Section for Amorphous Systems, Faculty of Technical Sciences, Čačak, University of Kragujevac

Abstract

Kinetic and operational electrolysis parameters determine the polarization characteristics, electrodeposition current efficiency, morphology, chemical composition and microstructure of nickel/iron/tungsten alloy deposits. The alloys electrodeposited at a current density of 50 mAcm-2 to 1000 mAcm-2 contain an amorphous phase and nanocrystals of an FCC solid solution of iron and tungsten in nickel. During annealing at temperatures above 500ºC, amorphous phase crystallization, crystalline grain growth of the FCC phase and a reduction in both internal microstrain and minimum density of chaotically distributed dislocations take place in the alloy. Milling the spongy deposit of the alloy causes amorphous phase crystallization, FCC-phase crystalline grain growth, and size reduction and rounding of powder particles.

Published
2017-12-13
Issue
Vol 47 No 3 (2015)
Section
Articles

Copyright 

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