Bulk Metallic Glasses

摘要

Metals and alloys generally exist as crystalline materials. Around 1960, it was discovered that rapid cooling of the melt resulted in the formation of alloys in glassy states. About 30 years later, multicomponent alloys were discovered that could be solidified as glasses at much lower cooling rates (～1 to 100 K/s or lower), resulting in samples larger than ～1 mm. Compared to their crystalline counterparts, these bulk metallic glasses (BMGs) often exhibit high com-pressive strength, good corrosion resistance, and large elasticity (1). Despite the identification of a vast range of BMGs and applications including sporting goods and electronic casings, the development of methods for rationally designing BMG alloys is still an important task.