The relation between the bulk and ribbon Zr55Ni25Al20 metallic glasses

被引：17

作者：

Illekova, E ^{[1
]}

Jergel, M ^{[1
]}

Duhaj, P ^{[1
]}

Inoue, A ^{[1
]}

机构：

[1] TOHOKU UNIV,INST MAT RES,SENDAI,MIYAGI 98077,JAPAN

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 226卷

关键词：

differential scanning calorimetry; metallic glasses; structural relaxation kinetics;

D O I：

10.1016/S0921-5093(96)10649-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The planar-flow-casting technique and quenching in flowing water were used to produce the glassy Zr55Ni25Al20 ribbon and bulk samples. The thermodynamic states of these two types of samples were compared using differential scanning calorimetry and analysis of the structural relaxation kinetics. The relaxation enthalpy is 3 times larger and the glass transition temperature is higher by 67.5 K in the case of the ribbon sample. These differences were theoretically confirmed by a kinetic model and were caused by the different quenching rates for the ribbon and bulk samples, namely 10(5) and 10(2) K s(-1), respectively. X-ray analysis has shown, that the main difference between the studied glassy structures consists in the different degree of the short-range order in the samples. (C) 1997 Elsevier Science S.A.

引用

页码：388 / 392

页数：5

共 12 条

[1]

BARTENEV GM, 1966, STROJENIE MECH SVOJS

[2]

CLAVAGUERA N, 1988, J NONCRYST SOLIDS, V104, P183

[3]

Harmelin M., 1985, Rapidly Quenched Metals. Proceedings of the Fifth International Conference, P659

[4] MEASUREMENTS OF ACCURATE SPECIFIC-HEATS OF METALLIC GLASSES BY DIFFERENTIAL SCANNING CALORIMETRY (DSC) .1. ANALYSIS OF THEORETICAL PRINCIPLES AND ACCURACIES OF SUGGESTED MEASUREMENT PROCEDURES [J].