Quantitative characterization of high temperature oxidation using electron tomography and energy-dispersive X-ray spectroscopy

被引：7

作者：

Zhou, Jihan ^{[1
,2
]}

Taylor, Matthew ^{[3
]}

Melinte, Georgian A. ^{[1
,2
]}

Shahani, Ashwin J. ^{[4
]}

Dharmawardhana, Chamila C. ^{[5
]}

Heinz, Hendrik ^{[5
]}

Voorhees, Peter W. ^{[6
]}

Perepezko, John H. ^{[3
]}

Bustillo, Karen ^{[7
]}

Ercius, Peter ^{[7
]}

Miao, Jianwei ^{[1
,2
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA

[3] Univ Wisconsin, Dept Mat Sci & Engn, 1509 Univ Ave, Madison, WI 53706 USA

[4] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[5] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80303 USA

[6] Northwestern Univ, Dept Engn Sci & Appl Math, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[7] Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Mol Foundry, Berkeley, CA 94720 USA

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

基金：

美国国家科学基金会;

关键词：

SI-B ALLOYS; ATOMIC-SCALE; MICROSCOPY; RESOLUTION;

D O I：

10.1038/s41598-018-28348-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：8

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