In situ scanning transmission electron microscopy (STEM) has evolved into an invaluable tool for investigating material systems whose elemental properties are influenced by dynamic processes on the micro‐ and nanoscale. By using modern holder systems to provide the required stimuli in combination with powerful aberration‐corrected microscopes, researchers can gain direct insight into intricate processes underlying temperature‐driven precipitation in aluminum alloys. However, while imaging methods are usually fast enough to keep up with the pace of such processes in dynamic experiments, spectroscopic STEM analysis techniques like energy‐dispersive X‐ray spectroscopy or electron energy‐loss spectroscopy (EELS) struggle to keep track. This study demonstrates the application of direct electron detection EELS in conjunction with high‐resolution STEM as a method capable of capturing chemical changes in a complex aluminum alloy during an in situ heating experiment.
Fisslthaler et al. (Sun,) studied this question.
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