In situ atomic-scale oscillation sublimation of magnesium under CO? conditions.

Sun, Yong; Guo, Jianxin; Fernandez, Carlos; Huang, Jianyu; Peng, Qiuming

Abstract

Understanding the interactive role between Mg and CO? is crucial for many technological applications, including CO? storage, melting protection, corrosion resistance, and ceramic welding. Here we report observations of rapid oscillation sublimation of Mg at room temperature in the presence of both CO? gas and electron irradiation using environmental transmission electron microscopy. The sublimation is mainly related to phase transformation of amorphous MgCO?. Differing from the direct formation of gas-state MgCO?, which attributes to the sublimation of pure Mg under a mild electron beam dose, a unique oscillation process is detected during the process of Mg sublimation under a harsh electron beam dose. The main reason stems from the first-order reaction of a reversible decomposition-formation of amorphous MgCO?. These atomic-level results provide some interesting insights into the interactive role between Mg and CO? under electron beam irradiation.

Citation

SUN, Y., GUO, J., FERNANDEZ, C., HUANG, J. and PENG, Q. 2019. In situ atomic-scale oscillation sublimation of magnesium under CO2 conditions. Langmuir [online], 35(1), pages 300-305. Available from: https://doi.org/10.1021/acs.langmuir.8b03580

• Journal Article Type: Article
• Acceptance Date: Dec 8, 2018
• Online Publication Date: Dec 10, 2018
• Publication Date: Jan 31, 2019
• Deposit Date: Jan 21, 2019
• Publicly Available Date: Dec 11, 2019
• Journal: Langmuir
• Print ISSN: 0743-7463
• Electronic ISSN: 1520-5827
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 35
• Issue: 1
• Pages: 300-305
• DOI: https://doi.org/10.1021/acs.langmuir.8b03580
• Keywords: Magnesium; Carbon dioxide; Sublimation; Gas-state; Amorphos
• Public URL: http://hdl.handle.net/10059/3265