Enhanced kinetic stability of a bulk metallic glass by high pressure

摘要

The metastable nature of metallic glasses (MGs) limits their applications. We report the formation of a stable Pd_(40.16)Ni_(9.64)Cu_(30.12)P_(20.08) MG with bulk size under high pressure at room temperature. The stable MG shows remarkably enhanced thermal and kinetic stability with substantially increased glass transition temperature T_g, crystallization temperature T_x, density and mechanical properties. The unique stability can be further reinforced by higher pressure and maintained even above T_g. This result can advance the glass design and the understanding of the fundamental issues in MGs.