借助于DSC的峰分析和随后的计算机数据处理,确定了金属玻璃Zr_(75.9)Ni_(24.(?))在恒温和连续升温两种结晶过程的动力学参数及TTT曲线.相应的有效激活能分别是224和194kJ/mol,反应指数分别是3.38和3.77.推测这是一个成核速率下降的共晶结晶过程.这与Altounian等人以及我们自己的X光衍射实验结果相一致.文中还对恒温和连续升温两种差热分析技术作了简短的讨论.
The TTT- curves and kinectic parameters of metallic glass Zr_(75.9)Ni_24.1) have been determined in both isothermal and non-isothermal (continuance scanning) crystallization processes. By means of peak analysis of DSC and the sequent data treatment with a computer program, the overall effective activation energy E= 224～194 kJ/mol and the reaction order n=3.38-3.77 have been obtained respectively. It is suggested that the process in discussion is characterized by eutectic growth with a decreasing nucleation rate. This is in agreement with the results of X-ray diffraction studies reported by Altounian et al. and present authors. A brief discussion about the isothermal and non-isothermal analysis used here and given.
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