Formability and Thermal Stability of Ce₆₂Al₁₅Fe₈Co₁₅ Bulk Metallic Glass

The formability and thermal stability of Ce₆₂Al₁₅Fe₈Co₁₅ bulk metallic glass (BMG) are studied by x-ray diffraction (XRD) and differential scanning calorimetry. The critical diameter of Ce₆₂Al₁₅Fe₈Co₁₅ BMG predicted by the parameter γ is about 3.1 mm, which is roughly in agreement with the XRD results. Stability of the BMG is investigated by means of continuous crystallization diagrams obtained from the extension of the Kissinger and Vogel-Fulcher-Tammann (VFT) equations comparatively. It is found that the dependence of crystallization temperature of the BMG on heating rates follows a nonlinear relationship rather than Kissinger and Lasoka's linear fittings. The thermal stability of the BMG is investigated by the VFT equation.