Abstract

AbstractAlumina/SiC nanocomposites are more wear resistant and have better surface finish than pure alumina of a similar grain size. Grain pullouts caused by intergranular fracture are observed on worn surfaces of alumina whereas only a few pullouts resulting from transgranular fracture and scratches caused by plastic deformation are the main features of a worn surface of the nanocomposites. Surface mechanical properties were investigated by Cr3+ fluorescence microscopy. The experiments were carried out using a variety of microstructures.

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