摘要
本文根据自由体积模型和固体材料的力学理论分析并讨论了金属玻璃在玻璃转变温度T_g附近的内耗行为。当考虑到体系中固状区和液状区的比例之后,得出了应力与应变之间的关系式。理论上把内耗和模量变化与玻璃转变过程有机地结合起来。证明了在T_g附近可以出现具有弛豫型特征的内耗降,并在玻璃转变过程中模量明显下降。理论与实验结果基本相符。
In this paper we analyze and discuss the characteristics of internal friction of metallic glasses near glass transition temperature T_g based on the model of free volume and mechanical theory of solids. The relationship between stress and strain was obtained if the proportion occupied by solid-like and liquid-like regions in the matrix of glassy state was considered. It is found theoretically that the internal friction peak being of relaxation type can appear in the vicinity of T_g and the modulus decrease dramatically during glass transition. The theoretical analysis is essentially in agreement with experimental results.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第4期575-583,共9页
Acta Physica Sinica
