2009 Volume 50 Issue 4 Pages 749-751
Alumina/graphene composite powders were produced by ball milling alumina and graphite for different times. Transmission electron microscopy (TEM) was used to characterize the obtained powders. 3–4 nm graphene sheets were produced after 30 h milling time. Accelerative effect of alumina to ball milling was also studied. Graphene reinforced alumina-based composites were fabricated by spark plasma sintering (SPS) technique from as-prepared powders. Microstructural observation of fracture surface was conducted using scanning electron microscopy (SEM). It was found that adding graphene would hinder grain growth of alumina, making much finer particles.