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The melting points of uranium dioxide, tungsten, and graphite were measured as a function of the isostatic pressure up to 2000 bar (200MPa), in a laser-heated autoclave filled with inert gas. The measured melting curves and their slopes were compared with predictions obtained from the Clausius-Clapeyron equation and existing thermochemical data of these substances. While for tungsten and graphite the results show reasonable agreement with the equilibrium thermodynamic calculations, the melting point of UO(2) increases with pressure with a slope more than three times larger than expected.

Additional information

Authors: MUSELLA M, ITU Karlsruhe, Karlsruhe (DE);RONCHI C, ITU Karlsruhe, Karlsruhe (DE);SHEINDLIN M, Russian Academy of Sciences, IVTAN, Moscow (RU)
Bibliographic Reference: Article: International Journal of Thermophysics, 20(1999) 4, 1177-1188
Availability: Available from Public Relations and Publications Unit, Ispra (IT)
Record Number: 200011842 / Last updated on: 2000-03-03
Original language: en
Available languages: en