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The use of two-dimensional shape parameters to characterize abrasive particles is a possible approach to express their angularity. Nonetheless, in sliding abrasion, especially in pin abrasion testing, coated papers structure plays an important role and even its damage during the wear process should not be neglected. This manuscript discuss the limitations of two-dimensional shape descriptors in distinguishing wear caused by relatively hard particles, indicating that the wear data obtained in sliding abrasion tests are unable to distinguish different types of coated papers used when only the two-dimensional particle projection is considered for shape characterization.

A DISCUSSION ON THE APPLICATION OF BI-DIMENSIONAL SHAPE FACTORS OF PARTICLES CAUSING SEVERE WEAR OF METALS