Abstract
Shape SiC tubes were prepared by electrophoresis process. The anodic deposits with thickness from 0.35 to 1.10 mm were attained using low electric field from alcoholic slurry. The SiC dispersion in ethanol with solid loading of 10 vol.% was used. Slurry dispersion degree is a function of SiC surface oxidation degree. High surface oxidation degree give rises a more stable suspension in alcoholic medium. The engineering of the surface allowed creating appreciable amount of free silanol groups (Si–OH). Otherwise, absence of free silanol groups on the surface leads to non-significant or unstable deposit. Very high dispersion degree was attained by addition of a recent commercial deflocculant based on acrylic acid-acrylate copolymer. The enhanced characteristics of the dispersion and particle charge with addition of deflocculating agent are discussed.
Published Version
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