Improvement in the mechanical properties of self-lubricating tungsten carbide bodies that include carbon onion was carried out in terms of microstructure and sintering conditions. Tungsten carbide particles and carbon onion were mixed through ball milling process to achieve homogeneous dispersion. The conditions of electrical current activated sintering were examined regarding temperature, compacting pressure and compaction rate. Ball milling and sintering at the low temperature such as 1500°C resulted in achieving homogeneous microstructure of sintered bodies and leading to higher relative density and Vickers hardness. In accordance with the higher relative densities, surface roughness was reduced because of fewer large voids in sintered bodies. Examination of the sintering behavior revealed that carbon onion performed as lubricative agent for tungsten carbide powders during sintering. Moreover, tungsten carbide sintered bodies including carbon onion showed the similar corrosion resistance as binder-less tungsten carbide bodies.