期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 325, 期 1-3, 页码 179-186出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0022-3093(03)00311-9
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Differential scanning calorimetry has been used to investigate the structural relaxation in a bulk metallic glass designated Vit 4. Results indicate that Vit 4 has a broad glass transition region with a glass transition temperature of approximately 621 K and an activation enthalpy of 834 kJ/mol. Despite the broad transition region, Wunderlich's model suggests that structural relaxation in Vit 4 involves the cooperative motion of a single bead. The relaxation behavior was well described by the Tool-Narayanaswamy equation, with x and beta values not significantly different from other glass formers. The dynamic and thermodynamic fragility of Vit 4 is compared with other glasses. (C) 2003 Elsevier B.V. All rights reserved.
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