Original scientific paper
Study of high density plasma spray parameters using plasma coaxial accelerator
H. A. El-Gamal
; Plasma Department, Nuclear Research Center, Atomic Energy Authority, Egypt
M. A. Hassouba
; Physics Department, Faculty of Science, Benha University, Egypt
H. A. El-Tayeb
; Plasma Department, Nuclear Research Center, Atomic Energy Authority, Egypt
M. Abdul-Moname
; Physics Department, Faculty of Science, Benha University, Egypt
Abstract
Plasma accelerator was used for the deposition of a material powder placed at a breach. A capacitor bank of 46.26 µF charged to 3 kV (208.17 J) gave a peak current of 8.8 kA after 15 µs. Plasma inductance varied between 3 µH and 1.5 µH while the plasma resistance varied between 5 mΩ and 300 mΩ within one shot, while the electron temperature and plasma density near the substrate measured with a double electric probe was about 3 eV and 2.7 × 1013 cm−3 , respectively. Carbon plasma velocity at the muzzle was 6.0 cm/µs which agrees with calculations. The deposited graphite powder showed mostly a homogeneous distribution of clusters. The total efficiency of the system, considering both the internal and kinetic energy, was found to be 10.9 %.
Keywords
coaxial plasma accelerator; deposition of graphite powder
Hrčak ID:
301682
URI
Publication date:
1.3.2004.
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