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TVT, 2018, Volume 56, Issue 3, Pages 338–345 (Mi tvt10888)  

Plasma Investigations

Liquid phase formation on graphite electrode surface in arc discharge

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

Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow

Abstract: 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.

Funding Agency Grant Number
Russian Foundation for Basic Research 06-08-00056
The work was supported by the Russian Foundation for Basic Research, project no. 06-08-00056a.

Author to whom correspondence should be addressed

DOI: https://doi.org/10.7868/S0040364418030031

Full text: PDF file (1688 kB)
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English version:
High Temperature, 2018, 56:3, 327–333

Bibliographic databases:

UDC: 536.20; 536.423
Received: 13.06.2017
Accepted:26.12.2017

Citation: V. P. Polishchuk, I. S. Samoilov, R. Kh. Amirov, V. I. Kiselev, “Liquid phase formation on graphite electrode surface in arc discharge”, TVT, 56:3 (2018), 338–345; High Temperature, 56:3 (2018), 327–333

Citation in format AMSBIB
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