Enthalpy recovery and free volume relaxation in a Zr44Ti11Ni10Cu10Be25 bulk metallic glass

被引：24

作者：

Evenson, Zach ^{[1
]}

Busch, Ralf ^{[1
]}

机构：

[1] Univ Saarland, Chair Metall Mat, D-66123 Saarbrucken, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷

关键词：

Bulk metallic glasses; Enthalpy; Calorimetry; Free volume; Dilatometry; STRUCTURAL RELAXATION; LIQUIDS; DEPENDENCE; TRANSITION; VISCOSITY;

D O I：

10.1016/j.jallcom.2010.12.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on the free volume of the Zr44Ti11Ni10Cu10Be25 bulk metallic glass in terms of its enthalpy recovery and volumetric relaxation below the glass transition temperature, T-g. Glassy samples are isothermally annealed below T-g using differential scanning calorimetry and the resulting enthalpy recovery, Delta H-r, is measured upon re-heating into the supercooled liquid region. Volumetric changes below T-g are measured isothermally using Thermo-Mechanical Analysis. The total changes in the relative free volume, Delta v(f)/v(m), between the initially glassy state and the equilibrium liquid are calculated from the volumetric relaxation. The measured values of Delta H-r and Delta v(f)/v(m) correlate well within the framework of free volume theory and a linear relationship is found between the two. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：S38 / S41

页数：4

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