Production of Ceramic-Intermetallic Compounds by High Speed Mechanical Alloying

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High speed mechanical alloying process has been developed to yield non-equlibrium phase alloy, nano-structured intermetallics and their compisites with ceramics. Through our research and development during three years, we have found the following five results :1) Our developed mechanical alloying process can reduce the processing time by 1/10 to 1/100, make large yield of synthesized materials in the order of kilograms, and have wide range of flexible controllability.2) Fundamental processes to govern the high speed mechanical alloying can be investigated and discussed by a series of experiments where imposed mechanical energy, die-set temperature and atmosphere are controllable.3) Two dimensional Eulerian elasto-plastic finite element method was developed to make direct simulation of plastic deformation, flow and fracture processes of powder mixture and to claryfy the mechanism of high speed mechanical alloying theoretically.4) Controlled fracture forming process was further developed to yield SUS and/or Ni sheathed ceramic wires and fibers for fabrication of preforms in metal-matrix composite.5) Shock reacive processing from mechanically alloyed precursors should be a new, non-traditional processing to synthesize intermetallics and their composites with ceramics even in solid-phase.