کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1469259 | 1510026 | 2013 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Quasi in situ analytical TEM to investigate electrochemically induced microstructural changes in alloys: AA2024-T3 as an example Quasi in situ analytical TEM to investigate electrochemically induced microstructural changes in alloys: AA2024-T3 as an example](/preview/png/1469259.png)
A quasi in situ method using a specially developed holder is presented to follow electrochemically induced microstructural changes on a nanometre scale using analytical transmission electron microscopy (TEM). By following a specific specimen area after repeated exposure to oxygen bubbled through aqueous HCl of pH = 3, de-alloying of a grain-boundary precipitate of ∼200 nm was observed by monitoring the changes in the EELS copper L2,3-edge and EFTEM elemental maps. These results, supporting the existing models of de-alloying of copper rich precipitates in aluminium alloys, demonstrate the effectiveness of the quasi in situ specimen holder for analytical TEM studies of corrosion.
► Electrochemical changes are studied quasi in situ using analytical TEM.
► Initiation of an electrochemical attack on a nanoscale is investigated in AA2024.
► De-alloying of a Cu-rich precipitates studied in a HCl/O2 environment.
► Specially developed TEM holder guarantees the accuracy of the quasi in situ study.
► This method can be extended to study several surface reactions on a nanoscale.
Journal: Corrosion Science - Volume 69, April 2013, Pages 221–225