Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 12 No. 6 December 2002|
amorphous Zr70Cu20Ni10 alloy annealed at 380℃
（1. Key Laboratory of Liquid Structure andHeredity of Materials, Ministry of Education,Shandong University, Ji′nan 250061, China;
2. College of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China）
Abstract:Crystallization behavior of amorphous Zr70Cu20Ni10alloy isothermally annealed at 380℃ was first investigated by employing the differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). It has been found that an exothermic peak appears in the DSC trace when the annealing time is about 17~18min, indicating a certain phase transformation occurs in the matrix of amorphous Zr70Cu20Ni10 alloy. Meanwhile, isothermal annealing experiments for amorphous Zr70Cu20Ni10 alloy ranging from 360℃ to 400℃ with a temperature interval of 10℃ were also carried out, from which no exothermic reaction can be observed except for the case of 380℃. This behavior indicates that the phase transformation during isothermal annealing of amorphous Zr70Cu20Ni10 alloy is strongly temperature-and time-dependent. Further investigations are required to reveal the nature of such phenomenon.
Key words: crystallization behavior; amorphous Zr70Cu20Ni10 alloy; isothermal annealing; differential scanning calorimetry (DSC); transmission electron microscopy (TEM); local Avrami exponent