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

Journal Article · · Scientific Reports
DOI: https://doi.org/10.1038/srep15428 · OSTI ID:1259297
 [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)

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.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Materials at Irradiation and Mechanical Extremes (CMIME); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
2008LANL1026; 51401208; 2015RP18
OSTI ID:
1259297
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (7)

Self-organization of helium precipitates into elongated channels within metal nanolayers journal November 2017
Strength and plasticity of nanolaminated materials journal July 2016
Self-organization of helium precipitates into elongated channels within metal nanolayers journal November 2017
Interface Effects on He Ion Irradiation in Nanostructured Materials journal August 2019
Micro-scale modeling of interface-dominated mechanical behavior journal October 2017
Radiation-Induced Helium Bubbles in Metals journal March 2019
A novel impedance sensing approach for precise electromechanical characterization of cells journal August 2019

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