Structural relaxation in a bulk metallic glass

被引：33

作者：

Hammond, VH ^{[1
]}

Houtz, MD ^{[1
]}

O'Reilly, JM ^{[1
]}

机构：

[1] USAF, Res Lab, MLBP, Wright Patterson AFB, OH 45433 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2003年 / 325卷 / 1-3期

关键词：

D O I：

10.1016/S0022-3093(03)00311-9

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：179 / 186

页数：8

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