Effect of Al Addition on Thermal Stability and Thermoplastic Forming Ability of Ti35Zr15Ni40Cu10 Metallic Glass in the Supercooled Liquid Region

In the present study, the effect of the addition of 0.5 at% Al on the thermal stability and thermoplastic forming ability of Ti35Zr15Ni40Cu10 metallic glass have been investigated. The results of non-isothermal and isothermal DSC experiments show that the addition of Al stabilizes the supercooled liquid. The activation energies obtained by non-isothermal (isothermal) DSC experiments are 389 (540) and 417 (558) KJ/mol for Ti35Zr15Ni40Cu10 and Ti35Zr14.5Ni40Cu10Al0.5, respectively. Based on the higher thermal stability of the supercooled liquid, the thermoplastic forming ability is improved with the addition of Al. The largest filling depths for Ti35Zr15Ni40Cu10 and Ti35Zr14.5Ni40Cu10Al0.5 are ~ 6.1 μm and ~ 7.5 μm, respectively. Besides, the parameters of Fmod for the two metallic glasses has been calculated to compare the thermoplastic forming ability. The Fmod parameters are 6.65 × 10–12 Pa−1 and 1.8 × 10–11 Pa−1 in Ti35Zr15Ni40Cu10 and Ti35Zr14.5Ni40Cu10Al0.5, respectively.