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Investigation of growth conditions of fibrous deposits in carbon arc

Published online by Cambridge University Press:  31 January 2011

P. Byszewski ,
K. Ukalski ,
E. Mizera  and
E. Kowalska
P. Byszewski
Affiliation:
Institute of Vacuum Technology, Długa 44/50, 00–241 Warsaw, and Institute of Physics, PAN, al. Lotników 32/46, 02-668 Warsaw, Poland
K. Ukalski
Affiliation:
Institute of Vacuum Technology, Długa 44/50, 00–241 Warsaw, Poland
E. Mizera
Affiliation:
Institute of Physics, PAN, al. Lotników 32/46, 02–668 Warsaw, Poland
E. Kowalska
Affiliation:
Institute of Vacuum Technology, Długa 44/50, 00–241 Warsaw, Poland
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Abstract

Carbon fibrous deposits grown in carbon dc electric arc at various buffer gas pressures and arc currents were investigated by transmission and scanning electron microscopy. The fibers contained in the deposits consisted of bundles of carbon tubes. It was found that yield and morphology were very sensitive to both parameters; sintering of the tubes could be prevented by adjusting buffer gas pressure for a given current. It is argued that these parameters control expansion of carbon gas and condensation rate, and therefore energy flow to the cathode. To purify samples by oxidation and to observe differences in resistance against oxidation of samples obtained at various conditions, the thermogravimetry method was used.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 6 , June 1997 , pp. 1551 - 1557
Copyright
Copyright © Materials Research Society 1997

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References

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