Metal-matrix nanocomposites (MMNCs) strengthened with nano-scale reinforcements are very promising materials for a large number of applications. For nano-carbon materials such as fullerene, carbon nanotube and graphene considered as reinforcing agents in this study, the main issues to be faced in the production of MMNCs is dispersion of reinforcement in the metal matrix and consolidation of these composite powders. Recently, owing to developed powder metallurgy techniques, nano-carbon materials can be separately dispersed in the metal matrix and bulk MMNCs of disks, rods, sheets are successfully produced. We evaluated strengthening behavior of the nanocomposites. High specific surface area of the reinforcement can contribute to efficient load transfer and furthermore, interfacial bonding characteristic between the reinforcement and the matrix also significantly influence on the strength of the MMNCs. Much superior mechanical properties of the bulk MMNCs could be commercially used soon.