Novel Synthesis of Nanocrystalline Nickel Dispersed with Nano-size WO3 Particles by Electrodeposition

Yushi Kato, Hiroshi Fujiwara, Hiroyuki Miyamoto, Takuya Goto
2015 International Journal of Metallurgical & Materials Engineering  
Bulk nanocrystalline nickel dispersed homogenously with nano-scale hard WO 3 particles has been successfully synthesized by a novel synthesis using electrodeposition. In this synthesis, ionized WO 4 2molecules in an electrolyte were transformed into WO 3 particles and embedded into a nanocrystalline nickel matrix during electrodeposition by controlling the pH and potential of the electrode. The effect of the presence of nano-size oxide dispersions on the strength and thermal stability of
more » ... stability of nanocrystalline structures was demonstrated. This is indeed a new class of bulk nanocrystalline metals in that nano-scale second-phase particles are not reactive precipitate from the solute-supersaturated matrix, but are stable oxide particles resistant to the so-called Ostwald ripening. In this regard, future optimization of this synthesis have potential to realize nanocrystalline metals with record-high strength and thermal stability, superior to their precipitates-or solutes-stabilized counterparts.
doi:10.15344/2455-2372/2015/102 fatcat:iut7daoynzgwxduc4snlegivqm