Mechanically Induced Solid-State Reaction for Synthesizing New Multicomponent Ta₅₅Zr₁₀Ni₁₀Al₁₀Cu₁₅ Glassy Alloy Powders with Extremely Wide Supercooled Liquid Region

抄録

New multicomponent Ta-based glassy alloy powder was synthesized by mechanical alloying a mixture of elemental Ta₅₅Zr₁₀Ni₁₀Al₁₀Cu₁₅ powders at room temperature, using a low-energy ball mill. The glassy powders of the final-product (1080 ks) in which its glass transition temperature (T_g) lies at a high temperature (834 K), crystallize through a single sharp exothermic peak at 1004 K (T_x). The total enthalpy change of crystallization (ΔH_x) is −10.32 kJ/mol. The supercooled liquid region before crystallization (ΔT_x) of the synthesized glassy powder shows the widest value (170 K) of any reported metallic glassy system.