Thermochemical Investigations on Intermetallic UMe sub 3 Compounds (Me=Ru,Rh,Pd)

摘要

The subject of this thesis is the determination of the thermodynamic properties of the intermetallic compounds of uranium with the light platinum metals, ruthenium, rhodium and palladium. These intermetallics are formed as very stable compounds during fission in nuclear fuel by the reaction of the fission products Ru, Rh and Pd with the matrix. Methods for the preparation of URu sub 3 , URh sub 3 and UPd sub 3 , experiments showing the chemical reactivities of these compounds, and studies of the stoichiometry of hexagonal UPd sub 3 by X-ray diffraction of solubility experiments of UN and palladium in UPd sub 3 , are described. Thermodynamic properties of the UMe sub 3 compounds have been obtained using several experimental thermodynamic techniques: fluorine bomb calorimetry, low-temperature cryogenic calorimetry, high-temperature drop calorimetry and EMF measurements of reversible cells. (Atomindex citation 13:670998)