材料期刊网

Pulsed high-energy-density plasmas were used to process the surfaces of alumina ceramics. The morphology and composition of different parts of the surfaces of the as-processed samples were examined by scanning electron microscopy and energy dispersive X-ray spectroscopy, respectively. The distinct morphology of the surfaces of the as-processed samples, particularly smooth areas and pits, was observed and studied. Uniform sub-micrometer particles about 250 nm in diameter were observed in the pits and proved to contain copper. No elemental copper was detected in the smooth areas. The analysis results showed that the plasmas were dusty. X-ray photoelectron spectroscopy was employed to examine the valence of the copper. An adiabatic model was used to explain the observed phenomena. A possible method for rapid finishing of advanced ceramics was proposed.