Control of Vacuum Arc Cathode Spot Movement for Development of High Speed Removal Method of Oxide Layer

The surface treatment technology using the vacuum arc cathode spot has a problem that the random walk of the cathode spot cannot be controlled. In order to control this movement, this research elucidated the factors that cause the cathode spot movement when a transverse magnetic field is applied, and developed a method for controlling the movement of the cathode spot. In 2018, the vapor distribution from the base metal and oxide layer was obtained when a transverse magnetic field was applied. In addition, the cathode surface analyzed, and a magnetic field control device was developed. In 2019, the factors that cause the cathode spot movement was elucidated using the thermal electromagnetic fluid simulation. In 2020, vacuum arc cathode spot movement control method for ultra-high-speed oxide layer removal was elucidated. From the above, a cathode spot movement control method for the development of an ultra-high-speed oxide layer removal method is elucidated.