NANOCRYSTALLINE TaC AND TaSi_2 FORMED BY MECHANOCHEMICAL REACTION
机械化学反应法制备纳米晶TaC和TaSi2

The structural evolution of nanocrystalline intermetallic compounds TaC and TaSi2formed by mechanochemical reaction was studied by XRD, TEM and SEM. Results show that TaC and TaSi2were directly synthesized from elements through interdiffusion process. The high density of defects and interfaces of nanocrystallites induced by high energy ball milling would surely promote the reaction process.Correspondent: DONG Yuanda, Department of Material Science and Engineering, Shanghai University of Technology,Shanghai 200072