A5082006622- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Radioactive element chemistry and processing
- Nuclear materials and radiation effects
- Fusion materials and technologies
- Advanced ceramic materials synthesis
- Nuclear and radioactivity studies
- Graphite, nuclear technology, radiation studies
- Additive Manufacturing Materials and Processes
- Advanced materials and composites
- Additive Manufacturing and 3D Printing Technologies
- Inorganic Chemistry and Materials
- High Temperature Alloys and Creep
- High-Temperature Coating Behaviors
- Hydrogen Storage and Materials
- Molten salt chemistry and electrochemical processes
- Hydrogen embrittlement and corrosion behaviors in metals
- Rare-earth and actinide compounds
- MXene and MAX Phase Materials
- Aluminum Alloys Composites Properties
- Semiconductor materials and devices
- Electron and X-Ray Spectroscopy Techniques
- Advanced Materials Characterization Techniques
- Glass properties and applications
- Ion-surface interactions and analysis
Lawrence Livermore National Laboratory
2020-2024
Pacific Northwest National Laboratory
2023-2024
Battelle
2023-2024
Oak Ridge National Laboratory
2014-2023
National Technical Information Service
2019-2023
Office of Scientific and Technical Information
2019-2023
Bellevue Hospital Center
2018-2019
University of Tennessee at Knoxville
2013-2014
University of Nevada, Las Vegas
2007-2012
Argonne National Laboratory
2008
Growth and microstructure of a protective or nonprotective SiO 2 scale the subsequent volatilization formed on high‐purity chemical vapor deposited ( CVD ) SiC nuclear‐grade / composites have been studied during high‐temperature 100% steam exposure. The environmental parameters interest were temperature from 1200°C to 1700°C, pressure 0.1 MPa flow velocities 0.23 145 cm/s. Scale was characterized via electron microscopy X‐ray diffractometry. Arrhenius dependence parabolic oxidation linear...
The reaction mechanism and kinetics of the thermal decomposition uranium dinitride/uranium sesquinitride to mononitride under inert atmosphere at elevated temperature were studied. An increase in lattice parameter UN(2)/alpha-U(2)N(3) phase was observed as increased, corresponding a continuous removal nitrogen. Electron density calculations for these two compounds using XRD powder patterns samples utilizing charge-flipping technique performed first time visualize decrease nitrogen level...
Journal Article LAMDA: Irradiated-Materials Microscopy at Oak Ridge National Laboratory Get access Chad M Parish, Parish Materials Science and Technology Division, Laboratory, Ridge, TN USA Search for other works by this author on: Oxford Academic Google Scholar N A P Kiran Kumar, Kumar Lance L Snead, Snead Philip D Edmondson, Edmondson Kevin G Field, Field Chinthaka Silva, Silva Marie Williams, Williams Kory Linton, Linton Keith J Leonard Microanalysis, Volume 21, Issue S3, 1 August 2015,...
A key barrier to industrial implementation of droplet-on-demand liquid metal jetting is the limited knowledge process-properties relationships for printed components. Herein we investigate influence two parameters; baseplate temperature and infill rotation angle, on densification, microstructure, tensile properties AlSi7Mg parts produced via magnetohydrodynamic-based additive manufacturing. Adjusting from 220°C-500°C resulted in substantial variation mechanical material, however, angle had a...
Liquid metal jetting droplet-on-demand additive manufacturing is an attractive alternative to industry-standard, laser-based techniques that use powder feedstocks and produce large heat affected zones. provides a low feedstock footprint, minimal materials waste, less contamination inclusions from feedstock, compatible with range of materials. However, little has been reported on the liquid process-structure-property relationships are crucial understanding how consistently print high quality...
The oxidative ammonolysis route was used to synthesize three uranium nitrides, UN2, U2N3, and UN, using UF4 as the starting material. Powder XRD analysis showed UN2 U2N3 products contain less than 1.0 wt % oxides. UO2 level identified be 5.0 (0) in UN product it is made, but this increases upon exposure air. morphology of these nitrides studied with SEM, while microstructures were investigated by TEM techniques for first time. An explicit microstructural characterization also presented....
Quartz single-crystal samples consisting of α-quartz crystal structure were neutron irradiated to fluences 5 × 1018, 4 1019, and 2 1020 n/cm2 (E > 0.1 MeV) at two temperatures (52 95 °C). The changes in the phase as a function these conditions (temperature fluence) studied using X-ray powder diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), results acquired complementary techniques are presented single place for first time. XRD studies showed that lattice...
Abstract In the context of demonstration UREX (uranium extraction) process, a separation uranium and technetium using an anion exchange resin was performed on simulant solution containing 98.95 g/L 238 U 130.2 mg/L 99 Tc. After sorption resin, TcO 4 − eluted with NH OH, eluting stream treated, converted to Tc metal (yield=52.5%). The purity compound analyzed: it contains less than 23.8 μg per gram characterized by X-ray diffraction (XRD) absorption fine structure (XAFS) spectroscopy; EXAFS...