Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimir: 1093-3611
ISSN On-line: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v8.i2.70
pages 221-231

CHARACTERIZATIONS OF THE CARBON ARC AT FULLERENE SYNTHESIS

I. P. Smyaglikov
Physical Technical Institute, National Academy of Sciences of Belarus, Minsk, Belarus
V. D. Shimanovich
Institute of Molecular and Atomic Physics of NAS of Belarus, 70 Skaryna Av., 220072 Minsk, Belarus
A. I. Zolotovsky
Institute of Molecular and Atomic Physics of NAS of Belarus, 70 Skaryna Av., 220072 Minsk, Belarus

RESUMO

The arc between graphite electrodes 6 mm in diameter under conditions favorable for fullerene synthesis (I= 60÷120 A, U= 20÷40 V, L = 1÷6 mm, p = 1÷200 torr) is considered. The parameters of plasma and macroparticles, time-spatial structure of the arc as well as properties of obtained materials were studied. For the first time it was found out that the electric arc between graphite electrodes exists in two modes. The arc from one mode passes in another spontaneously. In the non-stationary mode the arc looks like two spiral channels coming from an anode spot and revolving on lateral surface of cylindrical electrodes. The observed unsteadiness arises from the development of overheating instability of heterogeneous plasma. It was ascertained that the growing part of voltage-current characteristic of the arc corresponds to its double-mode operation. The mechanism of cathode deposit formation in the carbon arc by macroparticles arisen from condensation and coalescence of products of graphite anode erosion was developed. Within the boundary layer of the particle collision with a cathode such conditions are realized under which their melting is possible, and then the stage of quasiepitaxial growth of deposit takes place from a liquid phase.


Articles with similar content:

CHARACTERIZATIONS OF THE CARBON ARC AT FULLERENE SYNTHESIS
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.9, 2005, issue 3
V. D. Shimanovich, A. I. Zolotovsky, I. P. Smyaglikov
SPECTROSCOPIC AND PROBE DIAGNOSTICS OF CARBON PLASMA FLOWS OF A PULSE VACUUM ARC
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.14, 2010, issue 1-2
S.V. Goncharik, V. V. Azharonok, L. E. Krat'ko, N. M. Chekan, N. I. Chubrik, I. P. Smyaglikov
THERMAL AND NON-THERMAL REGIMES OF GLIDING ARC DISCHARGES
Proceedings of Symposium on Energy Engineering in the 21st Century (SEE2000) Volume I-IV, Vol.0, 2000, issue
Ozlem Mutaf-Yardimci, Alexei V. Saveliev, Alexander A. Fridman, Lawrence A. Kennedy
MODELING OF THERMAL HISTORY OF SPLATS LAYERING DURING COATING FORMATION
Progress in Plasma Processing of Materials, 1999, Vol.1, 1999, issue
A. Haddadi, Guy Delluc, Bernard Pateyron, Pierre Fauchais
Interaction of dispersed ceramic particles and melted domains with turbulent plasma jet
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2009, issue
Vitas Valincius, Romualdas Kezelis, Vilma Snapkauskiene, V. Grigaitiene, Pranas Valatkevicius