Microstructure and Arc Ablation Properties Investigation of Cuw Alloys Prepared from W@Ni Core-Shell Powders

Abstract

In this study, We investigated the microstructure and arc ablation properties investigation of CuW alloys prepared from W@Ni core-shell powders. Firstly, the W@Ni core-shell powder with uniform distribution of Ni was obtained by optimizing the current density and pulse width. Secondly, the W@Ni core-shell powder was used as the original powder to obtain the Ni-activated W skeletons. Finally, infiltrating liquid Cu to Ni-activated W skeletons was used to achieve homogeneous CuW alloys. The results show that the CuW alloys have a uniform microstructure compared to those without Ni, and Ni is mainly distributed in the W matrix. The trace amount of Ni can improve the density and hardness of the CuW alloys. Meanwhile, the uniform microstructure benefits arc dispersion and enhances the arc ablation resistance of the CuW alloys.

Keywords: CuW alloys, core-shell powder, intermittent eletrodeposition, arc ablation