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Revealing hidden defects through stored energy measurements of radiation damage

Journal Article · · Science Advances
With full knowledge of a material’s atomistic structure, it is possible to predict any macroscopic property of interest. In practice, this is hindered by limitations of the chosen characterization techniques. For example, electron microscopy is unable to detect the smallest and most numerous defects in irradiated materials. Instead of spatial characterization, we propose to detect and quantify defects through their excess energy. Differential scanning calorimetry of irradiated Ti measures defect densities five times greater than those determined using transmission electron microscopy. Our experiments also reveal two energetically distinct processes where the established annealing model predicts one. Molecular dynamics simulations discover the defects responsible and inform a new mechanism for the recovery of irradiation-induced defects. The combination of annealing experiments and simulations can reveal defects hidden to other characterization techniques and has the potential to uncover new mechanisms behind the evolution of defects in materials.
Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
European Commission (EC); National Science Foundation (NSF); USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1924801
Report Number(s):
INL/JOU-21-63417-Rev000
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 31 Vol. 8; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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  • Ślęzak, Tomasz; Koniorczyk, Piotr; Zmywaczyk, Janusz
  • THERMOPHYSICS 2019: 24th International Meeting of Thermophysics and 20th Conference REFRA https://doi.org/10.1063/1.5132739
conference January 2019
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