Pulsed coaxial thermal plasma sprayer

Details Pulsed coaxial thermal plasma sprayer Pulsed coaxial thermal plasma sprayer

B - Operations, Transporting

23

K

327/72

B23K 9/04 (2006.01) B05B 7/22 (2006.01) C23C 4/12 (2006.01)

Patent

CA 1070393

TITLE PULSED COAXIAL THERMAL PLASMA SPRAYER INVENTORS John H. W. Lau C. James Margerum ABSTRACT OF THE DISCLOSURE Apparatus for thermal spraying powdered material onto a substrate. The apparatus consists of an elongated conductive tube, an electrode positioned coaxially within one end of the tube. Inert gas such as helium is mixed with a powdered material such as a ceramic or a metal and a controlled amount is injected evenly into the tube. A high energy pulse is applied between the electrode and the conductive tube to produce current sheets which move from one end of the electrode to the other forming a high temperature and velocity plasma for melting and discharging the powdered material at a high velocity from the other end of the tube.

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