Kinetics of precipitation in AlSc alloys and low temperature solid solubility of scandium in aluminium studied by electrical resistivity measurements
Kinetics of precipitation in AlSc alloys and low temperature solid solubility of scandium in aluminium studied by electrical resistivity measurements
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DOI：
10.1016/0921-5093(93)90401-y
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发表时间：
1993-11
期刊：
影响因子：
6.4
通讯作者：
H. Jo;S. Fujikawa
中科院分区：
文献类型：
--
作者：
H. Jo;S. Fujikawa
研究了Al-0.090at.%中Al 3Sc相的析出动力学Sc和Al-0.15at.%在533 ~ 733 K的时效温度范围内，主要通过电阻率测量研究了Sc合金。由电阻率值计算富铝基体的平均Sc浓度cSc。从时间标度、Johnson-Mehl-Avrami方程和Ostwald熟化理论的观点分析了cSc和溶质转化分数随时间变化的结果。的快速生长阶段的Al 3Sc相成功地缩放，几乎其特征在于由一个固定数量的颗粒的扩散控制的增长模型。通过对富铝基体中Sc的分析，估算了733 ~ 643 K范围内Sc在Al中的固溶度。
The precipitation kinetics of Al3Sc phases in Al-0.090at.%Sc and Al-0.15at.%Sc alloys were investigated in the aging temperature range from 533 to 733 K mainly by electrical resistivity measurements. The average Sc concentrationcScof the Al-rich matrix was calculated from the value of the resistivity. The results of aging time dependence ofcScand fraction of solute transformed were analysed from the viewpoint of time scaling, the Johnson-Mehl-Avrami equation and the Ostwald ripening theory. The rapid growth stage of the Al3Sc phases was successfully scaled and nearly characterized by the model of diffusion-controlled growth of a fixed number of particles. The solid solubilities of Sc in aluminium from 733 K down to 643 K were estimated by the analysis ofcScof the Al-rich matrix during the Ostwald ripening of the Al3Sc precipitates.