Kinetics of the glass-transition and crystallization process of Fe72−xNbxAl5Ga2P11C6B4 (x=0, 2) metallic glasses
Kinetics of the glass-transition and crystallization process of Fe72−xNbxAl5Ga2P11C6B4 (x=0, 2) metallic glasses
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DOI：
10.1063/1.1361099
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发表时间：
2001-04
影响因子：
4
通讯作者：
N. Mitrović;S. Roth;J. Eckert
中科院分区：
文献类型：
--
作者：
N. Mitrović;S. Roth;J. Eckert
采用恒速升温差示扫描量热法研究了Fe 72 − xNbxAl 5Ga 2 P11 C6 B4（x=0，2）多元铁磁非晶合金在不同升温速率下的玻璃转变动力学和晶化过程.玻璃化转变温度Tg和结晶峰温度Tp随着加热速率的增加而向更高的温度移动。表观活化能和频率因子由Kissinger方法计算，结晶过程的速率常数由Arkenius定律估算。的玻璃化转变过程的动力学进行了分析的Vogel-Fulcher-Tammann方程描述的玻璃化转变温度的加热速率的依赖性。从玻璃转变动力学和晶化动力学的角度研究了铌的加入对玻璃形成能力的影响，结果表明，铌取代铁并不能提高玻璃形成能力，反而降低了玻璃形成能力。
The kinetics of the glass-transition and the crystallization process of multicomponent ferromagnetic Fe72−xNbxAl5Ga2P11C6B4 (x=0, 2) metallic glasses have been investigated by constant-rate heating differential scanning calorimetry at different heating rates. The glass-transition temperature Tg and the crystallization peak temperature Tp shift to higher temperatures with increasing heating rate. The apparent activation energy and the frequency factor are evaluated by the Kissinger method, and the rate constant of the crystallization process is estimated by an Arrhenius law. The kinetics of the glass-transition process have been analyzed in terms of a Vogel–Fulcher–Tammann equation describing the heating rate dependence of the glass-transition temperature. The effect of the niobium addition on the glass-forming ability has been investigated with respect to the glass-transition and crystallization kinetics, revealing that substitution of Nb for Fe does not improve the glass-forming ability and it lowers the...