Materials Development Division

Non-Equilibrium Materials

Hidemi KATO

Prof.Hidemi KATO

  • Assoc. Prof. Takeshi WADA
  • Assist. Prof. Soo Hyun JOO

Development of new functional materials by nonequilibrium process

This laboratory is engaged in the research of the development of advanced functional materials, metallic glasses, metallicglass-matrix composites and nanoporous materials, which have remarkably different structure from those of conventional metals, by employing various nonequilibrium processes. The unique structure of such nonequilibrium material is expected to add novel functions to the material. Metallic glass is a glassy solid mainly prepared by rapidly quenching its liquid state. Due to its none-crystalline structure, metallic glass exhibits superior mechanical, chemical and magnetic properties. Metallic glass can transform to the supercooled liquid well below the melting temperature of its crystalline counterpart. This allows high precision viscous fl ow forming as the well-known ”glass working”. Based on the strategy of alloy design for metallic glass formation, we developed new dealloying method for fabrication of nanoporous metal and study its fundamental and application.

metallic glass, supercooled liquid, nanoporous metal, dealloying
Scanning electron micrographs

Scanning electron micrographs of (left) X-ray grating interferometers fabricated by imprinting at the supercooled liquid state of Pd-based metallic glass and (right) nanoporous Si prepared by the novel dealloying method

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