金属玻璃（Fe55Ni45）78Si8B14的低温结构弛豫

金属玻璃（Fe₅5Ni₄5）₇8Si₈B₁4的低温结构弛豫

摘要: 使用Bordoni型仪器测量了Fe—Ni基金属玻璃在结构弛豫过程中内耗和模量的变化,详细地研究了在低于500K的低温阶段模量的变化。结果表明,结构弛豫对温度的特性可划分为两个阶段:低温结构弛豫,主要由TSRO控制;高温结构弛豫,主要由TSRO和CSRO控制。低温结构弛豫的激活能约为17kJ/mol。

Abstract: A Bordoni-type system is used to measure internal friction and modulus of Fe-Ni based metallic glass during structural relaxation.Particularly,the changes in modulus have been studied in details at low temperature below 500K. The results show that the structural relaxation against temperature may be divided into two steps:the low or high temperature structural relaxation is governed by TSRO or by both CSRO and TSRO. The activation energy of low temperature structural relaxation is about 17kJ/mol.