Lawrence Livermore National Laboratory



Jason Jeffries

Executive Summary

We are developing and characterizing new advanced manufacturing techniques for the actinide rare earth metals to establish relationships between process, structure, property, and performance. Combining engineering, materials science, and computational modeling, these techniques enable streamlined materials production for weapons applications in support of national goals in stockpile stewardship science.

Publications, Presentations, Etc.

Childs, B., et al. 2019. "Alternative Pathways to Produce Actinide Metal." Actinide Separations Conference 2019, Kingsport, TN, May 2019. LLNL-ABS-771914.

——— . 2019 "Formation of Nitride and Carbide Compounds via Laser Synthesis." Solid Freeform Fabrication Symposium, Austin, TX, August 2019. LLNL-ABS-772083.

Elton, E., et al. 2019. "Large Effect of Surface Oxide on Measured Liquid Metal Rheology." LLNL Post-Doc Poster Symposium, Livermore, CA, May 2019. LLNL-POST-772659.

——— . 2019 "Large Effect of Surface Oxide on Measurement of Liquid Metal Viscosity." Solid Freeform Fabrication Symposium, Austin, TX, August 2019. LLNL-PRES-785017.

Heo, T. W., et al. 2019. "Mesoscale Modeling of Metal-Hydrogen Interactions." 4th International Symposium on Phase-Field Modeling in Materials Science, Bochum, Germany, July 2019. LLNL-ABS-767050.

——— . 2019 "A Phase-Field Model for Hydride Formation in Polycrystalline Metals: Application to δ-hydride in Zirconium Alloys." Acta Materialia, 181(262), doi: 10.1016/j.actamat.2019.09.047. LLNL-JRNL-774087.

Jeffries, J. 2018. "Pressure-Dependent Intermediate Valence Behavior in YbNiGa4 and YbNiIn4." Physical Review B. 98. doi: 10.1103/PhysRevB.98.214115. LLNL-JRNL-751141.

——— . 2019 "Microstructural Characterization of Pure Tin Produced by the Drop-on-Demand Technique of Liquid Metal Jetting." Metallurgical and Materials Transactions A. 50A: 4000-4005. doi: 10.1007/s11661-019-05357-z. LLNL-JRNL-768921.

——— . 2019 "Reduction of Uranium Triiodide to Metal by Thermal Decomposition." Journal of Radioanalytical Nuclear Chemistry 320(3): 793-800. doi: 10.1007/s10967-019-06541-6. LLNL-JRNL-768061.

Soderlind, P., et al. 2019. "Ground-State and Thermodynamical Properties of Uranium Mononitride from Anharmonic First-Principles Theory." Applied Sciences 9: 3914. doi: 10.13140/RG.2.2.14958.77122. LLNL-JRNL-787823.