Thermodynamic activity measurements of U-Fe and U-Ga alloys by mass spectrometry

Thermodynamic properties of uranium in Ga–In based alloys

“…The Ga-U system contains three intermetallic compound s, UGa 3 , U 3 Ga 5 and UGa 2 [3,4]. Previously reported U 2 Ga 3 phase has, in fact, the composition of U 3 Ga 5 [5,6]. Thermodynamic properties of U-Ga alloys were determined from the results of electrochemi cal, gallium vapor pressure and calorimetr y measure ments, as well as thermod ynamic calculations , and these include DG, DH and DS of formation of UGa 3 compound [7][8][9][10][11][12].…”

Thermodynamic activity measurements of iron in Fe–Zr alloys by high temperature mass spectrometry

“…Our apparatus has already been described by Gardie et al [21] and then by Baïchi et al [22] who improved the method with a restricted collimation device in order to discard the detection of parasitic surface re-vaporizations [23]. The envelope of the four effusion cells was made of molybdenum and the four Knudsen cells (crucible and lid) were made of pure ceramic oxide, hypostoichiometric yttria, Y 2 O 3−x for the alloys or dense alumina, Al 2 O 3 for the reference (pure Fe).…”

Ga-U (Gallium-Uranium)

“…Three phases, Ga 3 U, bGa 2 U, and Ga 3 U 2 , were shown as stable phases. In addition, [1993Oka] showed Ga 5 U 3 and GaU as possible stable phases. However, because crystal structures of Ga 5 U 3 , Ga 3 U 2 , and GaU were reported to be the same, it was speculated that only one of these phases is the true equilibrium phase.…”

“…It was found that (bU) and (aU) are in equilibrium with Ga 5 U 3 . Figure 1 shows the Ga-U phase diagram of [1993Oka] modified based on the work of [2007Sal]. Table 1 shows Ga-U crystal structure data.…”

“…The Ga-U phase diagram in [Massalski2] was updated by [1993Oka] based on [1992Gar]. Three phases, Ga 3 U, bGa 2 U, and Ga 3 U 2 , were shown as stable phases.…”