PURPOSE: To density while plastically fluidizing by sintering FeSi2 powder at a specific lower temperature range than the melting point of FeSi2 when the powder is sintered.
CONSTITUTION: The temperature of sintering FeSi2 powder is limited to a temperature range of plastically fluidizing lower by 120 to 60°C than the melting point of FeSi2. More desirably, the atmosphere is evacuated to vacuum to 10-3Torr or less, and the applied pressure is set to 150kgf/cm2 or more. The powder used as a material is sintered in particle solid phase, but fine particles are not incorporated to rough particles, but can be sintered while holding the particle size of the material powder. Thus, a fine structure in which the particle size distribution of the material particles is maintained as it is is exhibited, a dandifying phenomenon in which crystalline grains are moved by the applied pressure one by one to bury the pores, i.e., plastically fluidizing is conducted to expedite the dandifying.
HIROSAKI NAOTO
MUNAKATA FUMIO
