Time resolved x-ray imaging of dendritic growth in binary alloys
Time resolved x-ray imaging of dendritic growth in binary alloys
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DOI：
10.1103/physrevlett.83.5062
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发表时间：
1999-12-13
影响因子：
8.6
通讯作者：
Snigirev, A
中科院分区：
文献类型：
--
作者：
Mathiesen, RH;Arnberg, L;Snigirev, A
采用强相干单色同步辐射和快速读出低噪声探测器的直射束X射线成像技术，对锡铅合金的胞晶和枝晶凝固进行了非原位研究。在视场为1 mm(2)的条件下，时间分辨率和空间分辨率分别达到了0·7 S和2·5微米。采集的图像显示了来自相位和幅度对比度的特征，结合可获得的时间分辨率，为揭示非平衡凝固的动态过程提供了一种潜在的方法。
Direct beam x-ray imaging, with intense coherent monochromatic synchrotron radiation and a fast readout low noise detector has been used for ill situ studies of cellular and dendritic solidification of Sn-Pb alloys. Temporal and spatial resolutions down to similar to 0.7 s and similar to 2.5 mu m, respectively, with a field of view up to I mm(2) were obtained. The collected images display features from both phase and amplitude contrast which, combined with the attainable temporal resolution, provide a method with the potential to uncover dynamic processes in nonequilibrium solidification.