Fabrication and characterization of W -Ni nanocomposites via a facile chemical co-precipitation route

A novel method by combined chemical co-precipitation and hydrogen reduction was proposed in this work to synthesize nanopowders of W-10wt.%Ni. The morphology, microstructure and properties of the nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and transmission electron microscopy (TEM). It was found that the average grain size of NiW nanopowders were 18?40 nm. For evaluation of the thermal stability of the synthesized powders, further heat treatment under different temperatures were carried out, which demonstrated the addition of Ni influence the diffusion coefficient which leading to the variation of sin -tering structure. The form of NiW intermetallic compound inhibits the grain growth of nanopowder. ? 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

Automated summary

A novel method combining chemical co-precipitation and hydrogen reduction was proposed to synthesize nanopowders of W-10wt.%Ni in this study. The average grain size of NiW nanopowders was found to be 18-40 nm, and the addition of Ni influenced the diffusion coefficient, leading to variations in the sintering structure. The form of NiW intermetallic compound inhibited the grain growth of nanopowder.