Abstract

We report quantitative characterization of the high temperature oxidation process by using electron tomography and energy-dispersive X-ray spectroscopy. As a proof of principle, we performed 3D imaging of the oxidation layer of a model system (Mo3Si) at nanoscale resolution with elemental specificity and probed the oxidation kinetics as a function of the oxidation time and the elevated temperature. Our tomographic reconstructions provide detailed 3D structural information of the surface oxidation layer of the Mo3Si system, revealing the evolution of oxidation behavior of Mo3Si from early stage to mature stage. Based on the relative rate of oxidation of Mo3Si, the volatilization rate of MoO3 and reactive molecular dynamics simulations, we propose a model to explain the mechanism of the formation of the porous silica structure during the oxidation process of Mo3Si. We expect that this 3D quantitative characterization method can be applied to other material systems to probe their structure-property relationships in different environments.

Details

Title
Quantitative characterization of high temperature oxidation using electron tomography and energy-dispersive X-ray spectroscopy
Author
Zhou, Jihan 1 ; Taylor, Matthew 2 ; Melinte, Georgian A 1 ; Shahani, Ashwin J 3 ; Dharmawardhana, Chamila C 4 ; Heinz, Hendrik 4 ; Voorhees, Peter W 5 ; Perepezko, John H 2 ; Bustillo, Karen 6   VIAFID ORCID Logo  ; Ercius, Peter 6   VIAFID ORCID Logo  ; Miao, Jianwei 1 

1  Department of Physics and Astronomy and California NanoSystems Institute, University of California, Los Angeles, CA, USA 
2  Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, USA 
3  Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, USA 
4  Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO, USA 
5  Department of Materials Science and Engineering, Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, IL, USA 
6  National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA 
Pages
1-8
Publication year
2018
Publication date
Jul 2018
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-018-28348-3
ProQuest document ID
2065386494
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.