Morphological Features of Graphene in Al2O3/G Nanocomposite

The features of the shape and distribution of graphene flakes in the Al2O3/G nanocomposite based on corundum nanoceramics obtained using spark plasma sintering technology have been studied. Scanning and transmission electron microscopy have shown the diversity of graphene morphology at the boundaries and inside grains, in the form of agglomerates and bridges, oriented and chaotic lamellar structures. It is shown that the addition of graphene leads to the appearance of shear bands in brittle ceramics, indicating intragranular deformation.