S041022 粉末冶金法で作製したアルミニウム基磁性材料の特性に及ぼすボールミル処理の影響([S041-02]粉末成形とその評価(2))

Abstract

Three different powders were produced; pure aluminum together with iron powders were mechanically alloyed (MAed); each elemental powder was mechanical milled (MMed); only pure aluminum powder was MMed, and subsequently MMed powder was added to pure iron powder: The all powders were consolidated into bulk materials by spark plasma sintering (SPS). Effects of MA, MM+MM or MM processes on magnetic properties of the SPS materials were evaluated by vibrating sample magnetometer. The formation of Al_5Fe_2 was observed in MA and MM+MM SPS materials. On the other hand, the aluminide compound was not formed in the MM SPS material. Formation and amount of the aluminide compounds were controlled by changing the process from MA to MM processing. As a result of suppression of formed alminide compounds, magnetic properties were improved in the SPS materials fabricated from powder produced by MM for only pure aluminum.