Geometrically defined, laser-generated abrasive surface


Abrasive surfaces can nowadays be produced incorporating precision cutting features of controlled shape, size, protrusion and location. This study investigates the influence of defined abrasive shapes (square/ triangular/conic pyramidal frusta) of designed groups of overlapped abrasives on the successive removal of ductile (Cu) and brittle (Al2O3) materials. Scanning electron microscopy studies combined with detailed micro-topographical evaluations of scratches/adjacent material have revealed the progressive actions of material removal/displacement of copper and the fracture and brittle/plastic transitions of sapphire for the different abrasive shapes, aiding a fundamental understanding of the influence of defined micro- geometries on the grinding process and resulting material surface topography.

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