Relationship between glass forming ability and thermal parameters of Zr based bulk metallic glasses

The compositions of Zr₄₁Ti₁₄Cu₁₂Ni₁₀Be₂₃ and Zr₅₅Ni₁₀Cu₂₀Al₁₅ bulk metallic glasses (BMGs) were modified by the addition of other elements, such as Nb, Fe, Mg, Y, Ta, and C. The modified alloys exhibit excellent glass forming ability (GFA). The glass transition temperature T _g, crystallisation temperature T _x, and offset melting temperature T _l of the composition modified Zr based alloys were determined by differential temperature analysis (DTA).Results show thatthe T _g, T _x,and T _lare allsensitive to the composition. The undercooled temperature from T _l to T _x, Δ T _l defined by Δ T _l = T _l - T _x, has a stronger correlation with the reduced glass transition temperature T _rg (T _rg = T _g/ T _l) than Δ T _x (Δ T _x = T _x - T _g).