Investigation of glass forming ability and crystallization kinetics of Zr_(63.5)Al_(10.7)Cu_(10.7)Ni_(15.1) bulk metallic glass

摘要

The glass forming ability, thermal stability and non-isothermal crystallization kinetics of Zr_(63.5)Al_(10.7)Cu_(10.7)Ni_(15.1) glass forming alloy were investigated. Its maximum glass forming dimension is up to 6 mm and its critical cooling rate is less than 40 K s~(-1). It manifests two crystallization procedures and the second crystallization peak is more sensitive to heating rate than the first crystallization peak. The glass transition and crystallization both have remarkable kinetics effects. The ms fitted by Arrhenius and VF equations are consistent with each other. Small m value about 17 indicates better thermodynamic stability and GFA of Zr_(63.5)Al_(10.7)Cu_(10.7)Ni_(15.1).