SEARCH · Search NASA
Results for “materials availability”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Graph-based deep learning frameworks for molecules and solid-state materials
Not provided.
Going the Distance: Long-Range Conductivity in Protein and Peptide Bioelectronic Materials
Not Available
The Influence of Intrinsic Framework Flexibility on Adsorption in Nanoporous Materials
Not Available
A New Spin on Material Properties: Local Magnetic Structure in Functional and Quantum Materials
Not Available
Empirical validation of size effects in sub-sized tensile specimens for nuclear structural materials
Not Available
Advancements in Validation of TSLs through Inelastic Neutron Scattering and Transmission Measurements [Abstract]
Historically, the free gas approximation has been used to treat the thermal scattering of neutrons with energies below a few electron-volts (eV) in unevaluated materials. However, this method inadequately reproduces neutron scattering at these energies. Until recently, only a limited number of materials had available thermal scattering law (TSL) files/libraries in the ENDF nuclear data libraries in this energy range. With advancements in atomistic modeling techniques, such as molecular dynamics, ab-initio molecular dynamics, and density functional theory, TSL libraries have become available for many more materials. This is particularly relevant due to the rising interest in several advanced reactor systems that require novel moderator and reflector materials. While quasi-integral and integral benchmarks have been designed to validate historically important moderator materials (such as light water and polyethylene), there is currently a lack of standard validation methods for TSLs, especially when multiple conflicting TSLs exist. To address this issue, the Oak Ridge National Lab Nuclear Data group has been working on utilizing inelastic neutron scattering (INS) measurements combined with transmission (i.e., total cross section) measurements to evaluate and validate TSLs for different materials. We plan to demonstrate how this method has worked on materials such as polyethylene, lucite, and polystyrene. In addition, we will compare the newly created libraries to ENDF libraries for these materials and explain why integral benchmarks should not be used for validation when multiple TSLs exist.
Mussel-Inspired Surface Engineering for Water-Remediation Materials
Not Available
Thermal stress-induced charge and structure heterogeneity in emerging cathode materials
Not Available
Anti-reflection coating design for metallic terahertz meta-materials
Not Available
Ultrafast evolution and transient phases of a prototype out-of-equilibrium Mott-Hubbard material
Not Available
Precipitate Size in GRCop-42 and GRCop-84 Cu-Cr-Nb Alloy Gas Atomized Powder and L-PBF Additive Manufactured Material
Not Available
Non-destructive determination of phase, size, and strain of individual grains in polycrystalline photovoltaic materials
Not Available