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Title: Designing Multiscale Porous Metal by Simple Dealloying with 3D Morphological Evolution Mechanism Revealed via X-ray Nano-tomography

Abstract

Designing materials with multiscale, hierarchical structure is critical to drive the advancement of new technology. Specifically, porous metals with multiscale porosity from nanometer to micrometer sizes would lead to enhanced physical and chemical properties—the micron-sized pores can increase the effective diffusivity of ion transport within the porous media, and the nano-sized pores provide high specific surface area, enabling functionalities that are unique to nanoporous metals. A new ternary precursor alloy selection concept utilizing the different mixing enthalpies is demonstrated in this work for the design of multiscale, bimodal porous copper from a simple, one-step dealloying of Cu–Fe–Al ternary alloy. The nanoporosity in the bimodal porous structure is formed from dealloying of the Cu-rich phase, whereas the microporosity is controlled by dissolving the Fe-rich phase, determined by both the initial Fe particle size and sintering profile. In addition to advancing the materials design method, the multiscale pore formation during dealloying was directly visualized and quantified via an interrupted in situ synchrotron X-ray nano-tomography. The 3D morphological analysis on tortuosity showed that the presence of the microporosity can compensate the increase of the diffusion path length due to nanoporosity, which facilitates diffusion within the porous structure. Altogether the focus of the workmore » is to introduce a new strategy to design multiscale porous metals with enhanced transport properties, and sheds light on the fundamental mechanisms on the 3D morphological evolution of the system using advanced synchrotron X-ray nano-tomography for future materials development and applications.« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3];  [4];  [5]; ORCiD logo [3]; ORCiD logo [3];  [2];  [2];  [5]; ORCiD logo [5];  [6]
  1. Wuhan Univ. of Technology (China); Stony Brook Univ., NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Stony Brook Univ., NY (United States)
  4. China Univ. of Mining and Technology, Xuzhou (China); Stony Brook Univ., NY (United States)
  5. Wuhan Univ. of Technology (China)
  6. Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1593264
Report Number(s):
BNL-213540-2020-JAAM
Journal ID: ISSN 1944-8244
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 12; Journal Issue: 2; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; bimodal porous Cu; materials design; 3D morphology; nano-CT; TXM

Citation Formats

Zou, Lijie, Ge, Mingyuan, Zhao, Chonghang, Meng, Qingkun, Wang, Hao, Liu, Xiaoyang, Lin, Cheng-Hung, Xiao, Xianghui, Lee, Wah-Keat, Shen, Qiang, Chen, Fei, and Chen-Wiegart, Yu-chen Karen. Designing Multiscale Porous Metal by Simple Dealloying with 3D Morphological Evolution Mechanism Revealed via X-ray Nano-tomography. United States: N. p., 2019. Web. https://doi.org/10.1021/acsami.9b16392.
Zou, Lijie, Ge, Mingyuan, Zhao, Chonghang, Meng, Qingkun, Wang, Hao, Liu, Xiaoyang, Lin, Cheng-Hung, Xiao, Xianghui, Lee, Wah-Keat, Shen, Qiang, Chen, Fei, & Chen-Wiegart, Yu-chen Karen. Designing Multiscale Porous Metal by Simple Dealloying with 3D Morphological Evolution Mechanism Revealed via X-ray Nano-tomography. United States. https://doi.org/10.1021/acsami.9b16392
Zou, Lijie, Ge, Mingyuan, Zhao, Chonghang, Meng, Qingkun, Wang, Hao, Liu, Xiaoyang, Lin, Cheng-Hung, Xiao, Xianghui, Lee, Wah-Keat, Shen, Qiang, Chen, Fei, and Chen-Wiegart, Yu-chen Karen. Tue . "Designing Multiscale Porous Metal by Simple Dealloying with 3D Morphological Evolution Mechanism Revealed via X-ray Nano-tomography". United States. https://doi.org/10.1021/acsami.9b16392. https://www.osti.gov/servlets/purl/1593264.
@article{osti_1593264,
title = {Designing Multiscale Porous Metal by Simple Dealloying with 3D Morphological Evolution Mechanism Revealed via X-ray Nano-tomography},
author = {Zou, Lijie and Ge, Mingyuan and Zhao, Chonghang and Meng, Qingkun and Wang, Hao and Liu, Xiaoyang and Lin, Cheng-Hung and Xiao, Xianghui and Lee, Wah-Keat and Shen, Qiang and Chen, Fei and Chen-Wiegart, Yu-chen Karen},
abstractNote = {Designing materials with multiscale, hierarchical structure is critical to drive the advancement of new technology. Specifically, porous metals with multiscale porosity from nanometer to micrometer sizes would lead to enhanced physical and chemical properties—the micron-sized pores can increase the effective diffusivity of ion transport within the porous media, and the nano-sized pores provide high specific surface area, enabling functionalities that are unique to nanoporous metals. A new ternary precursor alloy selection concept utilizing the different mixing enthalpies is demonstrated in this work for the design of multiscale, bimodal porous copper from a simple, one-step dealloying of Cu–Fe–Al ternary alloy. The nanoporosity in the bimodal porous structure is formed from dealloying of the Cu-rich phase, whereas the microporosity is controlled by dissolving the Fe-rich phase, determined by both the initial Fe particle size and sintering profile. In addition to advancing the materials design method, the multiscale pore formation during dealloying was directly visualized and quantified via an interrupted in situ synchrotron X-ray nano-tomography. The 3D morphological analysis on tortuosity showed that the presence of the microporosity can compensate the increase of the diffusion path length due to nanoporosity, which facilitates diffusion within the porous structure. Altogether the focus of the work is to introduce a new strategy to design multiscale porous metals with enhanced transport properties, and sheds light on the fundamental mechanisms on the 3D morphological evolution of the system using advanced synchrotron X-ray nano-tomography for future materials development and applications.},
doi = {10.1021/acsami.9b16392},
journal = {ACS Applied Materials and Interfaces},
number = 2,
volume = 12,
place = {United States},
year = {2019},
month = {12}
}

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