TY - JOUR
T1 - Three-dimensional morphological and chemical evolution of Nanoporous stainless steel by liquid metal dealloying
AU - Zhao, Chonghang
AU - Wada, Takeshi
AU - De Andrade, Vincent
AU - Williams, Garth J.
AU - Gelb, Jeff
AU - Li, Li
AU - Thieme, Juergen
AU - Kato, Hidemi
AU - Chen-Wiegart, Yu Chen Karen
N1 - Funding Information:
The authors thank Gwen Wright (Center for Functional Nano-materials, CFN) for assisting SEM, and Fernando Camino (CFN) for EDS support and sample preparation with FIB-SEM. Doğ Gürsoy and Francesco De Carlo (Advance Photon Sources, APS) are acknowledged for support in X-ray tomography reconstruction software, TomoPy. Li Li (National Synchrotron Light Source II, NSLS-II) is acknowledged for the development of XRF analysis software, PyXRF. The development of PyXRF software was supported by LDRD grant, funded by Brookhaven National Laboratory, and we acknowledge the funding support and the collaboration with Yong Chu (NSLS-II), the principal investigator of the project. The authors are also very grateful to the technical support from James Biancarosa, Michael Maklary, Carey Koleda (NSLS-II), and Alex Deriy (APS); control support from Wayne Lewis and Tommy Tang; and mechanical and design support from Yuan Yao, Michael Lucas, and Richard Gambella (NSLS-II). This research used resources and Submicron Resolution X-ray Spectroscopy Beamline (SRX, 5-ID) of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. K. Chen-Wiegart acknowledges support by the Department of Materials Science and Chemical Engineering, the College of Engineering and Applied Sciences, and the Stony Brook University, as well as by the Brookhaven National Laboratory under Contract No. DE-SC0012704.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/10/4
Y1 - 2017/10/4
N2 - 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 performancedetermining, critical 3D parameters, such as tortuosity, pore size, porosity, curvature, and interfacial shape.
AB - 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 performancedetermining, critical 3D parameters, such as tortuosity, pore size, porosity, curvature, and interfacial shape.
KW - Dealloying
KW - Nanoporous
KW - Stainless steel
KW - Tomography
KW - X-ray CT
KW - XRF
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U2 - 10.1021/acsami.7b04659
DO - 10.1021/acsami.7b04659
M3 - Article
C2 - 28869380
AN - SCOPUS:85032577702
SN - 1944-8244
VL - 9
SP - 34172
EP - 34184
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 39
ER -