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Title: Adhesion of voids to bimetal interfaces with non-uniform energies

Abstract

Interface engineering has become an important strategy for designing radiation-resistant materials. Critical to its success is fundamental understanding of the interactions between interfaces and radiation-induced defects, such as voids. Using transmission electron microscopy, here we report an interesting phenomenon in their interaction, wherein voids adhere to only one side of the bimetal interfaces rather than overlapping them. We show that this asymmetrical void-interface interaction is a consequence of differing surface energies of the two metals and non-uniformity in their interface formation energy. Specifically, voids grow within the phase of lower surface energy and wet only the high-interface energy regions. Furthermore, because this outcome cannot be accounted for by wetting of interfaces with uniform internal energy, our report provides experimental evidence that bimetal interfaces contain non-uniform internal energy distributions. Ultimately, this work also indicates that to design irradiation-resistant materials, we can avoid void-interface overlap via tuning the configurations of interfaces.

Authors:
 [1];  [2];  [3];  [2];  [4];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Xiamen Univ., Xiamen (China)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Materials at Irradiation and Mechanical Extremes (CMIME); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1259297
Grant/Contract Number:  
2008LANL1026; 51401208; 2015RP18
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; metals and alloys; surfaces, interfaces and thin films

Citation Formats

Zheng, Shijian, Shao, Shuai, Zhang, Jian, Wang, Yongqiang, Demkowicz, Michael J., Beyerlein, Irene J., and Mara, Nathan A. Adhesion of voids to bimetal interfaces with non-uniform energies. United States: N. p., 2015. Web. doi:10.1038/srep15428.
Zheng, Shijian, Shao, Shuai, Zhang, Jian, Wang, Yongqiang, Demkowicz, Michael J., Beyerlein, Irene J., & Mara, Nathan A. Adhesion of voids to bimetal interfaces with non-uniform energies. United States. doi:10.1038/srep15428.
Zheng, Shijian, Shao, Shuai, Zhang, Jian, Wang, Yongqiang, Demkowicz, Michael J., Beyerlein, Irene J., and Mara, Nathan A. Wed . "Adhesion of voids to bimetal interfaces with non-uniform energies". United States. doi:10.1038/srep15428. https://www.osti.gov/servlets/purl/1259297.
@article{osti_1259297,
title = {Adhesion of voids to bimetal interfaces with non-uniform energies},
author = {Zheng, Shijian and Shao, Shuai and Zhang, Jian and Wang, Yongqiang and Demkowicz, Michael J. and Beyerlein, Irene J. and Mara, Nathan A.},
abstractNote = {Interface engineering has become an important strategy for designing radiation-resistant materials. Critical to its success is fundamental understanding of the interactions between interfaces and radiation-induced defects, such as voids. Using transmission electron microscopy, here we report an interesting phenomenon in their interaction, wherein voids adhere to only one side of the bimetal interfaces rather than overlapping them. We show that this asymmetrical void-interface interaction is a consequence of differing surface energies of the two metals and non-uniformity in their interface formation energy. Specifically, voids grow within the phase of lower surface energy and wet only the high-interface energy regions. Furthermore, because this outcome cannot be accounted for by wetting of interfaces with uniform internal energy, our report provides experimental evidence that bimetal interfaces contain non-uniform internal energy distributions. Ultimately, this work also indicates that to design irradiation-resistant materials, we can avoid void-interface overlap via tuning the configurations of interfaces.},
doi = {10.1038/srep15428},
journal = {Scientific Reports},
number = ,
volume = 5,
place = {United States},
year = {2015},
month = {10}
}

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Cited by: 7 works
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