Article

Arhive, 2018, № 3

Plasma Investigations

2018. V. 56. № 3. P. 327–333

Polishchuk V.P., Samoilov I.S., Amirov R.Kh., Kiselev V.I.

Liquid phase formation on graphite electrode surface in arc discharge

The graphite electrode surface is studied after impact by an electric arc burning in an argon atmosphere at a pressure of $50$ kPa. The arc occurred as a result of the local destruction of a graphite rod heated by electric current and preliminarily kept for $2 \times 10^3$ s at a temperature of about $3$ kK. After the arc discharge with a current of about $100$ A with a duration within $1$ s, we found drop-like particles, $0.1$–$0.3$ mm in size, on the graphite electrode surface, which is evidence of the local occurrence of liquid carbon phase at a temperature of about $3.3$ kK. With longer arc burning, the melting zone propagated over the entire working surface of the electrodes; the surface became smoothed.

Article reference:
Polishchuk V.P., Samoilov I.S., Amirov R.Kh., Kiselev V.I. Liquid phase formation on graphite electrode surface in arc discharge, High Temp., 2018. V. 56. № 3. P. 327