Title: Dependence of the Melting Temperature on Pressure up to 2000 Bar in Uranium Dioxide, Tungsten and Graphite.
Authors: MUSELLA ManuelaRONCHI ClaudioSHEINDLIN M.
Citation: International Journal of Thermophysics vol. 20 no. 4 p. 1177-1188
Publication Year: 1999
JRC N°: JRC17246
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC17246
Type: Articles in Journals
Abstract: The melting point of uranium dioxide, tungsten and graphite was measured as a function of the isostatic pressure up to 2000 bar, in a laser-heated autoclave filled with inert gas. The measured melting curves and their slopes were compared with the predictions obtained from the Clausius-Clapeyron equation and the existing thermochemical data of these substances. Whilst for tungsten and graphite the results show a reasonable agreement with the equilibrium thermodynamic calculation, the melting point of UO2 increases with the equilibrium thermodynamic calculation, the melting point of UO2 increases with pressure with a slope more than three times larger than expected.
JRC Institute:Institute for Transuranium Elements

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