Real-time visualization of particle evolution during reactive flux-assisted processing of aluminum melts
Real-time visualization of particle evolution during reactive flux-assisted processing of aluminum melts
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DOI：
10.1016/j.scriptamat.2021.113978
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发表时间：
2021-08
影响因子：
6
通讯作者：
C. Reese;A. Gladstein;P. Shevchenko;Xianghui Xiao;A. Shahani;Alan I. Taub
中科院分区：
文献类型：
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作者：
C. Reese;A. Gladstein;P. Shevchenko;Xianghui Xiao;A. Shahani;Alan I. Taub
报道了通过通量辅助反应合成加工的 Al-TiC 金属基复合材料的多模式、多尺度相关断层扫描研究。同步加速器 X 射线显微放射成像用于实时可视化反应和粒子演化。颗粒直径和面数密度的变化表明该过程是成核而非生长主导的。在 950°C 时，大部分反应在不到 600 秒的相对较短的时间内发生。微观结构在 2D（扫描电子显微镜）和 3D（同步加速器 X 射线纳米断层扫描）中以更高分辨率成像，揭示了具有六边形片状形态的碳化物颗粒的形成。我们认为该形态是由于实验过程中掺入硅杂质而产生的。预计相关的断层扫描工作流程和分析可以指导未来的金属基复合材料（MMC）加工策略。
A multi-modal, multi-scale correlative tomography investigation of Al-TiC metal matrix composites processedviaflux-assisted reaction synthesis is reported. Synchrotron X-ray microradiography is utilized to visualize the reaction and particle evolution in real-time. Changes in particle diameter and areal number density suggest that the process is nucleation- rather than growth-dominated. At 950 °C, the bulk of the reaction takes place in a relatively short time span of less than 600 s. The microstructure is imaged at higher resolution in 2D (scanning electron microscopy) and 3D (synchrotron X-ray nanotomography), revealing the formation of carbide particles with a hexagonal platelet morphology. We propose that the morphology arises due to the incorporation of Si impurities during the experiment. It is expected that the correlative tomography workflow and analysis may guide future metal matrix composite (MMC) processing strategies.