Фазовая диаграмма системы Rh-V

К оглавлению: Другие диаграммы (Others phase diargams)


Rh-V (Rhodium-Vanadium) J.F. Smith The assessed Rh-V phase diagram is based on [77Wat], with review of the data of [77Aks]. The (Rh) terminal solution extends to ~19.5 at.% V near 1740 C with the solvus showing only a weak temperature dependence. The (V) terminal solution has a limit near 82 at.% V at 1730 C, and the Rh content decreases smoothly with decreasing temperature to reach ~86 at.% V near 700 C. Except for the data of [77Aks] above ~1300 to 1400 C, there is approximate to good agreement between [77Aks] and [77Wat] with regard to five of the six intermediate phases. The sixth phase reported by [77Aks] did not have its X- ray pattern indexed and was shown only as a line compound near 13 at.% V. In the assessed diagram this composition, at most if not all temperatures, lies within the phase field of the V-rich terminal solution. This disparity between the two diagrams in the V-rich region needs further investigation. 59Dwi: A.E. Dwight and P.A. Beck, Trans.Met. Soc. Am. Inst. Mining Met. Eng., 215, 976-979 (1959). 73Wat: R.M. Waterstrat and B. Dickens, J. Less-Common Met., 31, 61-67 (1973). 77Aks: O.V. Aksenova, V.V. Kuprina, V.B. Bernard, and R.O. Skolozdra, Vestn. Mosk. Univ., Ser. 2: Khim., 18(4), 429-432 (1977) in Russian; TR: Moscow Univ. Chem. Bull., 32(4), 40-42 (1977). 77Wat: R.M. Waterstrat and R.C. Manuszewski, J. Less-Common Met., 52, 293-305 ( 1977). Published in J. Alloy Phase Diagrams, 3(3), (1987) and Phase Diagrams of Binary Vanadium Alloys, 1989. Complete evaluation contains 1 figure, 2 tables, and 12 references. Special Points of the Rh-V System