Conference Proceedings Paper
A PROPOSED CATALYTIC MECHANISM OF PD ON THE FORMATION OF UBE13 IN EXPERIMENTAL CONSTRUCTION OF U-PD PHASE DIAGRAMS
37th Annual CNS Conference - 2017 June 04-07
M.H. Kaye (UOIT)
L.C. Wang (UOIT)
In previous U-Pd phase diagram determinations, contamination reactions of berrylia crucibles were observed. Measures were taken to reduce the amount of beryllium in the samples; however, the possibility of formation of a very stable metallic compound, UBe13, was neglected. The measured U-rich side eutectic temperature and composition and the Pd-rich side liquidus were controversial and much higher than the calculated results. Thermodynamic evaluation shows that crucible contamination (the formation of UBe13 catalyzed by Pd) changed the system from a binary to a ternary one and made the identification of compounds and determinations of phase boundaries extremely difficult. By comparing the binary phase diagrams of U-transition metals around Pd, and using the results of Local Density Approximation and the contamination reaction identified in this paper, a possible catalytic mechanism of Pd in the metallic system is proposed.
Individual Conference-Paper Copies (Electronic Where Available):
- For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each.
- For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request.
- Contact the CNS office to order reprints.