Abstract
Abstract The arc ablation properties of Ti3SiC2 material are systematically studied. The breakdown current increases with increasing load voltage from 3 kV to 10 kV. The results from an energy dispersive spectroscope, the Raman spectra, and X-ray photoelectron spectroscopy show that Ti3SiC2 is decomposed and oxidized to TiO2 and SiO2 by electric arcs. The breakdown strength first decreases, and then increases with breakdown times, arising from more and more oxides formed on the Ti3SiC2 surface. By means of field-emission scanning electron microscopy and a three-dimensional laser scanning confocal microscope, cracks, pores and pits are observed on the ablated Ti3SiC2 surface. The characteristics of element distributions are attributed to gravity, plasma forces and to the electromagnetic force, which is affected by the value of breakdown current.
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