ANGULARITY DETERMINATION OF ABRASIVE POWDERS

The influence of particle shape on abrasive processes is not well unde rstood, but the angularity of the abrasive powders is assumed to be an important parameter, For that purpose an automatic angularity determi nation program was developed, based on the curvature of a two-dimensio nal projection of a particle. This paper describes the algorithm used and the preliminary measurements and results. Aspects still open for i mprovement are: filtering of the pixel noise, reproducibility and the discriminative power of the algorithm. The most important question to answer was: ''What is a corner?''. In fairness it should be concluded that this question can only be answered successfully in combination wi th a particular application.