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Title: Non-random walk diffusion enhances the sink strength of semicoherent interfaces

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms10424· OSTI ID:1242984
 [1];  [2];  [3];  [2];  [4]
  1. CEA, DAM, DIF, Arpajon (France)
  2. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Texas A & M Univ., College Station, TX (United States)

Clean, safe and economical nuclear energy requires new materials capable of withstanding severe radiation damage. One strategy of imparting radiation resistance to solids is to incorporate into them a high density of solid-phase interfaces capable of absorbing and annihilating radiation-induced defects. Here we show that elastic interactions between point defects and semicoherent interfaces lead to a marked enhancement in interface sink strength. Our conclusions stem from simulations that integrate first principles, object kinetic Monte Carlo and anisotropic elasticity calculations. Surprisingly, the enhancement in sink strength is not due primarily to increased thermodynamic driving forces, but rather to reduced defect migration barriers, which induce a preferential drift of defects towards interfaces. The sink strength enhancement is highly sensitive to the detailed character of interfacial stresses, suggesting that ‘super-sink’ interfaces may be designed by optimizing interface stress fields. Lastly, such interfaces may be used to create materials with unprecedented resistance to radiation-induced damage.

Research Organization:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
NE0000533
OSTI ID:
1242984
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 76 works
Citation information provided by
Web of Science

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Cited By (6)

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Interface Effects on He Ion Irradiation in Nanostructured Materials journal August 2019
Anisotropic Radiation-Induced Changes in Type 316L Stainless Steel Rods Built by Laser Additive Manufacturing journal August 2018
Energetics of vacancy segregation to [100] symmetric tilt grain boundaries in bcc tungsten journal November 2016
Irradiation resistance of nanostructured interfaces in Zr–Nb metallic multilayers journal March 2019
Interaction between semicoherent interfaces and Volterra-type dislocations in dissimilar anisotropic materials journal August 2017