Low Temperature Structural Relaxation of Metallic Glass (Fe₅₅Ni₄₅)₇₈Si₈B₁₄

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.