Influence of chemical disorder on energy dissipation and defect evolution in concentrated solid solution alloys

Yanwen Zhang (), G. Malcolm Stocks, Ke Jin, Chenyang Lu, Hongbin Bei, Brian C. Sales, Lumin Wang, Laurent K. Béland, Roger E. Stoller, German D. Samolyuk, Magdalena Caro, Alfredo Caro and William J. Weber
Additional contact information
Yanwen Zhang: Oak Ridge National Laboratory
G. Malcolm Stocks: Oak Ridge National Laboratory
Ke Jin: Oak Ridge National Laboratory
Chenyang Lu: University of Michigan
Hongbin Bei: Oak Ridge National Laboratory
Brian C. Sales: Oak Ridge National Laboratory
Lumin Wang: University of Michigan
Laurent K. Béland: Oak Ridge National Laboratory
Roger E. Stoller: Oak Ridge National Laboratory
German D. Samolyuk: Oak Ridge National Laboratory
Magdalena Caro: Los Alamos National Laboratory
Alfredo Caro: Los Alamos National Laboratory
William J. Weber: Oak Ridge National Laboratory

Nature Communications, 2015, vol. 6, issue 1, 1-9

Abstract: Abstract A grand challenge in materials research is to understand complex electronic correlation and non-equilibrium atomic interactions, and how such intrinsic properties and dynamic processes affect energy transfer and defect evolution in irradiated materials. Here we report that chemical disorder, with an increasing number of principal elements and/or altered concentrations of specific elements, in single-phase concentrated solid solution alloys can lead to substantial reduction in electron mean free path and orders of magnitude decrease in electrical and thermal conductivity. The subsequently slow energy dissipation affects defect dynamics at the early stages, and consequentially may result in less deleterious defects. Suppressed damage accumulation with increasing chemical disorder from pure nickel to binary and to more complex quaternary solid solutions is observed. Understanding and controlling energy dissipation and defect dynamics by altering alloy complexity may pave the way for new design principles of radiation-tolerant structural alloys for energy applications.

Date: 2015
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DOI: 10.1038/ncomms9736

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