论文部分内容阅读
同步辐射光源具有高能量、高亮度、高分辨率、单色性好等优点,其配合高读写速度及高分辨率的CCD(charge coupled device)成像系统,可实现对金属合金凝固过程的枝晶生长动态行为进行实时成像观察.本研究利用北京同步辐射光源,采用X射线衍射增强成像法,对低熔点的Sn-Bi和Sn-Pb合金的凝固进程进行实时成像研究,成功地获得一系列丰富的等轴晶、柱状晶生长行为以及形貌演变的视频图像,这些成像结果为验证或完善已有的金属合金凝固理论提供了直接的第一手实验数据.同步辐射X射线实时成像技术为研究金属合金凝固理论提供了崭新的实验手段和研究思路.
The synchrotron radiation source has the advantages of high energy, high brightness, high resolution and good monochromaticity. The CCD (Charge Coupled Device) imaging system with high read / write speed and high resolution can realize the stability of the branch of the metal alloy during solidification Crystal growth dynamic behavior of real-time imaging.In this study, using Beijing synchrotron radiation light source, using X-ray diffraction enhanced imaging method, the low melting point Sn-Bi and Sn-Pb alloy solidification process of real-time imaging study successfully obtained a series of Rich equiaxed grains, columnar grain growth behavior and morphological evolution of the video images, these imaging results for the verification or improvement of the existing solidification theory of metal alloys provides direct first-hand experimental data. Synchrotron radiation X-ray real-time imaging technology The study of metal alloy solidification theory provides a new experimental means and research ideas.