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Neutron research

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Displaying 326 - 350 of 1579

Effects of Cathode Corrosion on Through-Plane Water Transport in Proton Exchange Membrane Fuel Cells

April 21, 2021
Author(s)
Daniel S. Hussey, Joseph Fairweather, Dusan Spernjak, Adam Weber, David Harvey, Silvia Wessell, David L. Jacobson, Kateryna Artyushkova, Rangachary Mukundan, Rodney Borup
The corrosion of carbon in the electrode supports of proton-exchange-membrane fuel cells leads to electrode collapse, reduced active catalyst area, and increased surface hydrophilicity. While these effects have been linked to performance degradation over

High-resolution neutron depolarization microscopy of the ferromagnetic transitions inNi3Al and HgCr2Se4 under pressure

April 21, 2021
Author(s)
Daniel S. Hussey, Muhammad Abir, B. Khaykovich, C. Pfleiderer, Pau Jorba, Marc Seifert, Michael Schulz
We performed spatially resolved imaging of ferromagnetic transitions in Ni3Al and HgCr2Se4 crystals. These neutron depolarization measurements discovered bulk magnetic inhomogeneities in the ferromagnetic transition temperature with the spatial resolution

Multi-scale analyses of constituent phases in a trip-assisted duplex stainless steel by electron backscatter diffraction, in situ neutron diffraction, and energy selective neutron imaging

April 21, 2021
Author(s)
Daniel S. Hussey, Wanchuck Woo, Jongyul Kim
Micrometer to centimeter scale analyses of the crystalline phase volume fractions in a trip- assisted duplex stainless steel were performed as a function strain using electron backscatter diffraction (EBSD), in situ neutron diffraction, and energy

Neutron Imaging of Laser Melted SS316 Test Objects with Spatially Resolved Small Angle Neutron Scattering

April 21, 2021
Author(s)
Daniel S. Hussey, Adam J. Brooks, Caroline G. Lowery, Gerald L. Knapp, Bridget E. Cadigan, Shengmin Guo, Leslie G. Butler
A novel neutron far field interferometer is explored for sub-micron porosity detection in laser sintered SS316 test objects. The results shown are images and volumes of the first quantitative neutron dark-field tomography at various autocorrelation lengths

Thermal And Visual Observation Of Water And Acetone Oscillating Heat Pipes

April 21, 2021
Author(s)
Daniel S. Hussey, David L. Jacobson, Hongbin Ma, R. A. Winholtz, Corey Wilson, Corey Borgmeyer
Identical oscillating heat pipes (OHP) charged separately with water and acetone were observed thermally and visually at varying condenser temperatures and heat inputs. Neutron radiography allowed visualization of hydrogen rich liquid water and acetone

Thick Sintered Electrode Lithium-Ion Battery Discharge Simulations: Incorporating Lithiation-Dependent Electronic Conductivity and Lithiation Gradient due to Charge Cycle

April 21, 2021
Author(s)
Daniel S. Hussey, Jacob LaManna, David L. Jacobson, Gary Koenig
In efforts to increase the energy density of lithium-ion batteries, researchers have attempted to both increase the thickness of battery electrodes and increase the relative fractions of active material. One system that has both of these attributes are
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