Low temperature relaxation effects on thermal stability and mechanical properties of ₆₅Cu₂₅Gd₁₀ metallic glass

Thermal stability of Mg₆₅Cu₂₅Gd₁₀ alloy has critical effects on its practical application and development as a structural material. The compression properties low temperature relaxed Mg₆₅Cu₂₅Gd₁₀ alloy and its thermal stability have been investigated by differential scanning calorimetry and X-ray diffraction to measure the characteristic temperatures and amorphous phase after annealing. Furthermore, the apparent activation energy of glass transition and crystallization are fitted by Kissinger means. According to the mechanical properties and thermal phase transition kinetics changes, it is shown that the compression properties do not change distinctly after low temperature relaxation, but the macro fracture modes and micro fractograph have indicated some different characteristics. Meanwhile, the activation energy of different transitions also changes a lot.