|About this Abstract
||MS&T23: Materials Science & Technology
||Emergent Materials Under Extremes and Decisive In Situ Characterizations
||In-situ Raman Studies on Synthesis and Oxidation of UC<sub>1-x</sub>N<sub>x</sub>
||Sam Karcher, Xiaofeng Guo, John McCloy
|On-Site Speaker (Planned)
Uranium carbide and uranium nitride are candidate accident tolerant fuel (ATF) systems which may afford a more stable waste form compared to uranium oxide-based fuels. These non-oxide fuels are still not well understood in comparison to uranium oxide fuels and therefore critical knowledge gaps exist when considering thermodynamic models pertaining to safe long-term disposal. In this study in-situ Raman spectroscopy is explored as a technique to a) measure the formation of UC<sub>1-x</sub>N<sub>x</sub> by carbothermic reduction of UO<sub>2</sub> and b) measure oxidation and corrosion of UC<sub>1-x</sub>N<sub>x</sub> and c) gain insight on additional defect structures as a result of doping with simulated fission products (ex. Ce, Nd, Yb, Zr). Thermogravimetric analysis and differential scanning calorimetry (TGA/DSC) are used to determine UN/UC formation and oxidation kinetics and provide a quantitative refence to correlate with in-situ Raman data.