In situ observation of temperature-dependent atomistic and mesoscale oxidation mechanisms of aluminum nanoparticles
Nano Research, ISSN: 1998-0000, Vol: 13, Issue: 1, Page: 183-187
2020
- 21Citations
- 52Usage
- 22Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations21
- Citation Indexes21
- CrossRef21
- 19
- Usage52
- Downloads49
- Abstract Views3
- Captures22
- Readers22
- 22
Article Description
Oxidation is a universal process causing metals’ corrosion and degradation. While intensive researches have been conducted for decades, the detailed atomistic and mesoscale mechanisms of metal oxidation are still not well understood. Here using in situ environmental transmission electron microscopy (E-TEM) with atomic resolution, we revealed systematically the oxidation mechanisms of aluminum from ambient temperature to ~ 600 °C. It was found that an amorphous oxide layer formed readily once Al was exposed to air at room temperature. At ~ 150 °C, triangle-shaped Al2O3 lamellas grew selectively on gas/solid (oxygen/amorphous oxide layer) interface, however, the thickness of the oxide layer slowly increased mainly due to the inward diffusion of oxygen. As the temperature further increased, partial amorphous-to-crystallization transition was observed on the amorphous oxide film, resulting in the formation of highly dense nano-cracks in the oxide layer. At ~ 600 °C, fast oxidation process was observed. Lamellas grew into terraces on the oxide/gas interface, indicating that the high temperature oxidation is controlled by the outward diffusion of Al. Single or double/multi-layers of oxide nucleated at the corners of the terraces, forming dense γ’-AlO, which is a metastable oxide structure but may be stabilized at nanoscale. [Figure not available: see fulltext.].
Bibliographic Details
https://dc.tsinghuajournals.com/graphical-abstracts/1376; https://dc.tsinghuajournals.com/nano-research/vol13/iss1/17
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85076771755&origin=inward; http://dx.doi.org/10.1007/s12274-019-2593-3; http://link.springer.com/10.1007/s12274-019-2593-3; https://dc.tsinghuajournals.com/graphical-abstracts/1376; https://dc.tsinghuajournals.com/cgi/viewcontent.cgi?article=2375&context=graphical-abstracts; https://dc.tsinghuajournals.com/nano-research/vol13/iss1/17; https://dc.tsinghuajournals.com/cgi/viewcontent.cgi?article=2341&context=nano-research; http://sciencechina.cn/gw.jsp?action=cited_outline.jsp&type=1&id=6817908&internal_id=6817908&from=elsevier; https://dx.doi.org/10.1007/s12274-019-2593-3; https://link.springer.com/article/10.1007/s12274-019-2593-3
Tsinghua University Press
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