W-15%Cu alloys were sintered with mechanically activated powder in order to develop new preparing processes and improve properties of the alloys. The microstructures of activated powder and sintered alloys were observedand its properties such as density were measured. The results show that through mechan- ical activation, the surface energy and deformation energy of particles increase, and sintering processes were improved. Conglomeration microstructures in the alloys appear, W particles were sintered ...