Zhang Lei, Wang Shaogang
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
Materials (Basel). 2018 Sep 21;11(10):1795. doi: 10.3390/ma11101795.
Although X-rays generated from a laboratory-based tube cannot be compared with synchrotron radiation in brilliance and monochromaticity, they are still viable and accessible in-house for ex situ or interrupted in situ X-ray tomography. This review mainly demonstrates recent works using laboratory X-ray tomography coupled with the measurements of properties or performance testing under various conditions, such as thermal, stress, or electric fields. Evolvements of correlated internal structures for some typical materials were uncovered. The damage features in a graded metallic 3D mesh and a metallic glass under mechanical loading were revealed and investigated. Micro-voids with thermal treatment and void healing phenomenon with electropulsing were clearly demonstrated and quantitatively analyzed. The substance transfer around an electrode of a Li-S battery and the protective performance of a Fe-based metallic glass coating on stainless steel were monitored through electrochemical processes. It was shown that in situ studies of the laboratory X-ray tomography were suitable for the investigation of structure change under controlled conditions and environments. An extension of the research for in situ laboratory X-ray tomography can be expected with supplementary novel techniques for internal strain, global 3D grain orientation, and a fast tomography strategy.
尽管实验室产生的X射线在亮度和单色性方面无法与同步辐射相比，但它们对于异位或中断原位X射线断层扫描而言，在实验室内部仍然是可行且易于获取的。本综述主要展示了近期利用实验室X射线断层扫描，并结合在各种条件（如热、应力或电场）下的性能测量或性能测试所开展的工作。揭示了一些典型材料相关内部结构的演变情况。揭示并研究了梯度金属三维网格和金属玻璃在机械载荷下的损伤特征。清晰展示并定量分析了经过热处理后的微孔隙以及电脉冲作用下的孔隙愈合现象。通过电化学过程监测了锂硫电池电极周围的物质转移以及铁基金属玻璃涂层对不锈钢的保护性能。结果表明，实验室X射线断层扫描的原位研究适用于在可控条件和环境下研究结构变化。随着用于内部应变、全局三维晶粒取向以及快速断层扫描策略的补充新技术的出现，有望进一步拓展实验室原位X射线断层扫描的研究。
