Viscosity of the supercooled liquid and relaxation at the glass transition of the Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glass forming alloy

被引：462

作者：

Busch, R ^{[1
]}

Bakke, E ^{[1
]}

Johnson, WL ^{[1
]}

机构：

[1] CALTECH, W M Keck Lab Engn Mat, Pasadena, CA 91125 USA

来源：

ACTA MATERIALIA | 1998年 / 46卷 / 13期

关键词：

D O I：

10.1016/S1359-6454(98)00122-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The how and relaxation of the Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glass forming alloy was investigated in the supercooled liquid state and the glass transition region using parallel plate rheometry, three-point beam bending as well as differential scanning calorimetry. The results indicate that this bulk metallic glass Former is a strong liquid that, kinetically, behaves in a similar way as a silicate melt. The relaxation of the viscosity and specific heal capacity was investigated in isothermal experiments and with constant heating rates. The studies reveal that the relaxation of the viscosity into its equilibrium state is directly related to the calorimetric glass transition. The observed calorimetric glass transition in this strong glass former is of a purely kinetic nature and a thermodynamically metastable amorphous state cannot be observed in this bulk metallic glass forming liquid on a laboratory lime scale. The healing rate dependence of the calorimetric glass transition reflects the fragility of the liquid. (C) 1998 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：4725 / 4732

页数：8

共 38 条

[1] ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].