TRIBOCHEMICALLY ASSISTED WEAR OF SILICON-NITRIDE BALL

The response of silicon nitride balls to different chemical additives contained in a diamond slurry was studied in a high speed four-bull ma chine. It was found that there are two effective inorganic chemical ad ditives. acid additive (A) and alkaline additive (B). Use of A or. B i n the diamond slurry resulted in a high material removal rate and a ro ugh surface. With an increase in the size of the diamond particles con tained in the slurry, the material removal rate and the roughness of t he surface also increased Addition of sulfur-containing additives into the diamond slurries produced a decrease in the material removal rate but a smoother surface. The presence of water in the oil-based diamon d slurry gave an increase in the material removal rate and a relativel y smooth surface. In the ester-containing slurrry, there was an increa se in the material removal rate and the roughness of the surface.