Fast Synchrotron X‐Ray Tomography of Dynamic Processes in Liquid Aluminium Alloy Foam
Fast Synchrotron X‐Ray Tomography of Dynamic Processes in Liquid Aluminium Alloy Foam
复制标题
液态铝合金泡沫动态过程的快速同步X射线断层扫描
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Banhart
中科院分区：
文献类型：
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作者：
P. H. Kamm;F. García‐Moreno;T. Neu;K. Heim;R. Mokso;J. Banhart
一系列快速同步X射线层析成像以高达5 赫兹的速率连续拍摄，而铝合金前驱体在X射线透明设置中使用红外线(IR)激光加热几分钟。捕获了从固体前体到膨胀液体泡沫的整个发泡过程。对层析图像序列的分析侧重于成核和气泡的生长。在发泡的早期阶段，观察到气泡和裂纹的形成和演化。对成核阶段进行了分析，得到了成核中心个数及其分布的定量结果，并得出了成核率随时间的变化规律。
Series of fast synchrotron X‐ray tomographies are taken continuously at a rate of up to 5 Hz, while aluminium alloy precursors are foamed in an X‐ray transparent setup for several minutes using infra‐red (IR) lasers for heating. The entire foaming process from the solid precursor to the expanded liquid foam is captured. The analysis of the sequence of tomographies is done with an emphasis on nucleation and bubble growth. In early stages of foaming, bubble and crack formation and evolution are observed. We analyze the nucleation stage and obtain quantitative results for the number of nucleation centers and their distribution and derive the nucleation rate as a function of time.