Abstract
The relaxation behaviors of Ce 65Al 10Cu 20Co 5 and Zr 46.75Ti 8.25Cu 7.5Ni 10Be 27.5 (Vit4) bulk glass-forming supercooled liquids were investigated by frequency-dependent heat capacity measurements on a temperature-modulated differential scanning calorimetry (TMDSC) apparatus. The relaxation behaviors of the investigated samples were well described by Kohlrausch–Williams–Watts (KWW) function. The temperature dependences of characteristic relaxation time of the glass-forming liquids were fitted by Vogel–Fulcher–Tamman (VFT) equation. The derived fragility index m shows that Ce 65Al 10Cu 20Co 5 ( m = 31) liquid is a stronger liquid than Vit4 ( m = 42). The sizes of cooperatively rearranging region (CRR) for Ce 65Al 10Cu 20Co 5 and Vit4 liquids were estimated to be 1.6 and 1.4 nm, respectively.
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