| 摘要 |
<p>A high voltage, high current is applied between a cathode electrode (32) and a conductive body (31) forming a spray nozzle (31a) and acting as an anode electrode aligned with the cathode electrode (32) and being spaced therefrom. A vortex flow of plasma-producing gas is established within a cylindrical body (30) carrying the electrode (32) to create a low pressure core of gas flow extending through the anode passage (31) to establish an extended ionized arc column throughout the anode passage (31) with the rate of gas flow adjusted and the arc current correlated to the anode nozzle passage diameter to produce a supersonic extended ionized arc column (37) which extends beyond the end of the nozzle passage diameter. Preferably the material to be sprayed is introduced into the extended ionized arc column beyond the end of the nozzle to maximize the spray rate without undesirably overheating the spray material.</p> |
