Jiménez Catalina, Paeplow Marlen, Kamm Paul H, Neu Tillmann R, Klaus Manuela, Wagener Guido, Banhart John, Genzel Christoph, García-Moreno Francisco
Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, Berlin 12489, Germany.
Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany.
J Synchrotron Radiat. 2018 Nov 1;25(Pt 6):1790-1796. doi: 10.1107/S1600577518011657. Epub 2018 Sep 26.
High-speed X-ray imaging in two dimensions (radioscopy) and three dimensions (tomography) is combined with fast X-ray diffraction in a new experimental setup at the synchrotron radiation source BESSY II. It allows for in situ studies of time-dependent phenomena in complex systems. As a first application, the foaming process of an aluminium alloy was studied in three different experiments. Radioscopy, optical expansion measurements and diffraction were used to correlate the change of foam morphology to the various phases formed during heating of an AlMg15Cu10 alloy to 620°C in the first experiment. Radioscopy was then replaced by tomography. Acquiring tomograms and diffraction data at 2 Hz allows even more details of foam evolution to be captured, for example, bubble size distribution. In a third experiment, 4 Hz tomography yields dynamic insights into fast phenomena in evolving metal foam.
在同步辐射源BESSY II的一个新实验装置中，二维高速X射线成像（射线透视）和三维高速X射线成像（断层扫描）与快速X射线衍射相结合。它能够对复杂系统中随时间变化的现象进行原位研究。作为首个应用，在三个不同实验中研究了铝合金的发泡过程。在第一个实验中，使用射线透视、光学膨胀测量和衍射来关联泡沫形态的变化与AlMg15Cu10合金加热至620°C过程中形成的各个相。随后射线透视被断层扫描取代。以2Hz的频率获取断层图像和衍射数据，可以捕捉到泡沫演变的更多细节，例如气泡尺寸分布。在第三个实验中，4Hz的断层扫描能够对正在演变的金属泡沫中的快速现象进行动态洞察。
