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In situ atomic-scale oscillation sublimation of magnesium under CO₂ conditions.

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

Authors

Yong Sun

Jianxin Guo

Jianyu Huang

Qiuming Peng



Abstract

Understanding the interactive role between Mg and CO₂ is crucial for many technological applications, including CO₂ 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 CO₂ gas and electron irradiation using environmental transmission electron microscopy. The sublimation is mainly related to phase transformation of amorphous MgCO₃. Differing from the direct formation of gas-state MgCO₃, 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 MgCO₃. These atomic-level results provide some interesting insights into the interactive role between Mg and CO₂ 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 Mar 29, 2024
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