New Ti-based bulk metallic glasses with exceptional glass forming ability

New Ti-based bulk metallic glasses (BMGs) of Ti32.8+XZr30.2−XNi5.3Cu9Be22.7 (3 ≤ |X| ≤ 15, at.%) with large size were prepared. The results reveal that the forming of primary icosahedral quasicrystal phase (I-phase) and the enthalpy of the primary crystallization (ΔH1) were closely related to the glass forming abilities (GFAs). The crystallization product of the metallic glass alloys at primary crystallization state is a metastable I-phase. It is demonstrated that apparent activation energy for crystallization obtained by fitting the Kissinger equation at Tx temperature increases with the increase of Ti concentration, while GFAs deteriorate. The ΔH1 of metallic glasses declines with the increase of Ti concentration. The Ti32.8+XZr30.2−XNi5.3Cu9Be22.7 possess high similar compressive fracture strength of about 1800 MPa, which is one of the best options as structural materials on account of high specific strength and low cost.