121 メカニカルアロイング粉末とマグネシウム合金の温間圧縮接合(OS 新材料の加工技術(1))

抄録

Aluminum and alumina powders were mixed with various contents to magnesium alloy (AZ31) turning chips, the powder mixtures were mechanically alloyed (MA) using planetary ball mill. The obtained alloy powder was bonded to magnesium alloy by hot-pressing at heating Temperatures of 673K〜773K under 200MPa. Mg_<17>Al_<12> phase precipitates from super-saturated α-Mg phase in the alloy layer bonded Mg-Al_2O_3 MA powder. In the case of Mg-61.5mol%Al MA powder, the amorphous phase transforms to Mg_2Al_3 phase by hot-pressing. When hot-pressing at high heating temperature, MA powder bonded to AZ31 by diffusion mechanism.