Study of glass transition and crystallization in four metallic glasses using temperature modulated DSC

Glass transition behaviour of some metallic glasses can not be studied and observed by conventional DSC due the fact that they are closely followed by crystallization. However the newly developed temperature modulated DSC can separate these two transformations. Four metallic glasses, La₅₅Al₂₅Ni₁₀Cu₁₀, Mg₆₅Zn₃₅, Nd₆₀Fe₃₀Al₁₀ and Zr₃₀Y₃₀Al₁₅Ni₂₅, haye been studied by a temperature modulated differential scanning calorimetry (MDSC). It is clearly demonstrated that the glass transition can be separated from crystallization by the MDSC. Two glass transitions have been observed for Mg₆₅Zn₃₅, Nd₆₀Fe₃₀Al₁₀ and Zr₃₀Y₃₀Al₁₅Ni₂₅. Due to clearer observation of glass transition, the calculation ot reduced glass temperature T_rg can now be obtained with greater confidence.