Effects of colloid rheological characters in ultra-smooth polishing by nanoparticle colloid jet machining

摘要

Nanoparticle colloid jet machining is an ultra smooth surface processing technique which utilizes surface chemical reaction between work surface atoms and nanoparticles in colloid to remove the work's surface atoms. The purpose of the paper is to investigate the effects of colloid rheological characters in nanoparticle colloid jet machining. The nature of colloid determines the flow behavior of suspensions and ultimately affects the removal characteristic of nanoparticle colloid jet machining. The article focuses on how these colloid rheological characters (in particular, the pH value, the concentration and the shear viscosity of colloidal suspension) affect the machining process. A series of corresponding removal experiments have been conducted to investigate the removal peculiarities with different process parameters. The removal experimental results show that the machining rate is regularly affected by the rheological characters of colloidal suspension.