Microstructural Study on Oxygen Permeated Arc Beads

Abstract EN

We simulated short circuit of loaded copper wire at ambient atmosphere and successfully identified various phases of the arc bead.

A cuprous oxide flake was formed on the surface of the arc bead in the rapid solidification process, and there were two microstructural constituents, namely, Cu-κ eutectic structure and solutal dendrites.

Due to the arc bead formed at atmosphere during the local equilibrium solidification process, the phase of arc bead has segregated to the cuprous oxide flake, Cu-κ eutectic, and Cu phase solutal dendrites, which are the fingerprints of the arc bead permeated by oxygen.