Fig. 1. Diode voltage (blue line) and current (red line) curves during the process of electron beam interaction with four types of graphite

Fig. 2. Microscopic morphology images of four types of graphite before and after exposure to electron beams

Fig. 3. Diode voltage (blue line) and current (red line) curves during the interaction of graphite with 167 pulses of electron beams

Fig. 4. Microscopic morphology images of graphite 2#/1 μm TiC coating target after electron beam interaction (a) and schematic diagram of electron interaction regions (b). (c)~(f) are images of the enlarged regions in (a)

Fig. 5. Microscopic morphology images and schematic diagrams of microstructures for different graphite/TiC coatings in the center regions of electron beam interaction