1618 アモルファス相からなる MA 粉末の加圧焼結挙動

概要

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Mechanical alloyed powder milled for fully time mainly consists of metastable and/or unstable phases. Phases of these powders would be changed to be stable phases at elevated temperature. When the composition of milled powder corresponds to intermaetallic composition, distinct exothermic reaction will also occur at the same time. Two types of MA powder having the composition of Ti-37.5mol%Si used in this investigation, amorphous powder and (Ti+Si) lamellar structure powder. This investigation discusses the relationship between phase formation from meta/unstable phase to stable phase and densification properties during pressure sintering by using vacuum hot pressing technique. It is concluded that the phase formation from meta/unstable phase enhances the densification under the applied pressure, because of the excessive deformation associated with nucleation of newly phases.
一般社団法人日本機械学会の論文
2000-07-31