Research on plasma-shot phenomena using smoothed particle hydrodynamics

Plasma-Shot Treatment is a new technology for generating functional interface by moving electrode material to workpiece surface using micro pulsed discharge. It is possible to form the hard titanium carbide (TiC) layer of about 10 μm thickness which has high wear resistance when the electrode is made from the semi-sintered powder of TiC. In order to understand this Plasma-Shot phenomena, simulation by a computing technology is required because it is difficult to directly observe or measure the phenomena occurring in a micro gap in a short time. In this study, numerical simulation technology for the phenomena was developed using the smoothed particle hydrodynamics (SPH) method that is superior in dynamic expression of the large deformation and boundary movement. Since the Plasma-Shot phenomena have been visualized and relatively good agreement is found between the analysis result and the experiment one, this simulation technique is effective for understanding the phenomena and elucidating its mechanism.