期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 39, 页码 34172-34184出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b04659
关键词
nanoporous; stainless steel; tomography; dealloying; X-ray CT; XRF
资金
- LDRD grant - Brookhaven National Laboratory
- DOE Office of Science by Brookhaven National Laboratory [DE-SC0012704]
- Department of Materials Science and Chemical Engineering, College of Engineering and Applied Sciences
- Stony Brook University
- Brookhaven National Laboratory [DE-SC0012704]
- DOE Office of Science by Argonne National Laboratory [DE-AC02-06CH11357]
- Grants-in-Aid for Scientific Research [15K06478] Funding Source: KAKEN
Nanoporous materials, especially those fabricated by liquid metal dealloying processes, possess great potential in a wide range of applications due to their high surface area, bicontinuous structure with both open pores for transport and solid phase for conductivity or support, and low material cost. Here, we used X-ray nanotomography and X-ray fluorescence microscopy to reveal the three-dimensional (3D) morphology and elemental distribution within materials. Focusing on nanoporous stainless steel, we evaluated the 3D morphology of the dealloying front and established a quantitative processing-structure-property relationship at a later stage of dealloying. The morphological differences of samples created by liquid metal dealloying and aqueous dealloying methods were also discussed. We concluded that it is particularly important to consider the dealloying, coarsening, and densification mechanisms in influencing the performance-determining, critical 3D parameters, such as tortuosity, pore size, porosity, curvature, and interfacial shape.
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