A5000643404- Nuclear Materials and Properties
- Fusion materials and technologies
- Nuclear reactor physics and engineering
- Ion-surface interactions and analysis
- Nuclear materials and radiation effects
- Metal and Thin Film Mechanics
- Hydrogen embrittlement and corrosion behaviors in metals
- High-pressure geophysics and materials
- Microstructure and mechanical properties
- High Temperature Alloys and Creep
- High-Velocity Impact and Material Behavior
- Nuclear Physics and Applications
- Advanced Materials Characterization Techniques
- Microstructure and Mechanical Properties of Steels
- Graphite, nuclear technology, radiation studies
- High-Temperature Coating Behaviors
- Magnetic confinement fusion research
- Nuclear and radioactivity studies
- Semiconductor materials and devices
- Advanced ceramic materials synthesis
- Silicon Carbide Semiconductor Technologies
- Machine Learning in Materials Science
- High Entropy Alloys Studies
- Advanced Chemical Physics Studies
- Advanced materials and composites
Oak Ridge National Laboratory
2013-2023
National Technical Information Service
2012
Office of Nuclear Energy
2012
Office of Scientific and Technical Information
2012
University of California System
2009
Los Alamos National Laboratory
2005
General Atomics (United States)
2005
Idaho National Laboratory
2005
Argonne National Laboratory
2005
Marietta College
1996
A grand challenge in materials research is to understand complex electronic correlation and non-equilibrium atomic interactions, how such intrinsic properties dynamic processes affect energy transfer defect evolution irradiated materials. Here we report that chemical disorder, with an increasing number of principal elements and/or altered concentrations specific elements, single-phase concentrated solid solution alloys can lead substantial reduction electron mean free path orders magnitude...
Atomic collision processes are fundamental to numerous advanced materials technologies such as electron microscopy, semiconductor processing and nuclear power generation. Extensive experimental computer simulation studies over the past several decades provide physical basis for understanding atomic-scale occurring during primary displacement events. The current international standard quantifying this energetic particle damage, Norgett-Robinson-Torrens displacements per atom (NRT-dpa) model,...
Energetic ions have been widely used to evaluate the irradiation tolerance of structural materials for nuclear power applications and modify material properties. It is important understand defect production, annihilation migration mechanisms during after collision cascades. In this study, single crystalline pure nickel metal single-phase concentrated solid solution alloys 50%Ni50%Co (NiCo) 50%Ni50%Fe (NiFe) without apparent preexisting sinks were employed study dynamics under ion...
Density functional theory calculations of He defect properties in iron have shown an unexpected influence magnetism arising from the defect's electronic structure. In contrast with previous work that neglected such effects, results indicate tetrahedral position is energetically more favorable for interstitial than octahedral site. This may significant implications clustering and bubble nucleation, which will impact material performance future fusion reactors. These provide basis development...
The interstitial loop is a unique signature of radiation damage in structural materials for nuclear and other advanced energy systems. Unlike bcc metals, two types loops, 1/2<111> <100>, are formed iron its alloys. However, the mechanism by which <100> dislocation loops has remained undetermined since they were first observed more than fifty years ago. We describe our atomistic simulations that have provided direct observation formation. process was initially using self-evolving kinetic...
Helium defect properties in V, Nb, Ta, Mo, and W were studied using first-principles electronic structure calculations. The most stable position for the He all bcc metals is a substitutional site; tetrahedral interstitial more favorable than octahedral position. formation energy of nearly same metals, while strongly depends on host insignificantly its atomic size. obtained energies used to calculate binding vacancy. For Ta He-vacancy about one-half vacancy energy; Mo it 40% higher energy....