Advances in measurements of the melting transition in non-stoichiometric UO2
UNSPECIFIED (2004) Advances in measurements of the melting transition in non-stoichiometric UO2. In: 15th Symposium on Thermophysical Properties, JUN 22-27, 2003, Univ Colorado, BOULDER, CO.Full text not available from this repository.
This work presents a study of the melting behavior of the UO2+x system. Self-crucible pulsed-laser melting at high pressure is realized, further improving the recently developed experimental approach. Thermograms of the heated surface of the sample, recorded by a fast pyrometer, show thermal arrests and/or points of inflection corresponding to the phase transformations. A further probe laser beam is focused onto and reflected by the sample surface, and the reflected light intensity is used to detect the exact instants at which melting/freezing transitions occur. Furthermore, a model was developed describing the complex process of laser-induced melting in a system where a solubility gap accompanies the formation of liquid, and a corresponding numerical simulation of the melting-freezing process was performed in order to depict the heat and matter transport phenomena involved. Finally, liquidus and solidus lines are proposed for the system UO2+x in the range 0 less than or equal to x less than or equal to 0.21.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QC Physics
Q Science > QD Chemistry
T Technology > TJ Mechanical engineering and machinery
|Journal or Publication Title:||INTERNATIONAL JOURNAL OF THERMOPHYSICS|
|Publisher:||KLUWER ACADEMIC/PLENUM PUBL|
|Number of Pages:||13|
|Page Range:||pp. 533-545|
|Title of Event:||15th Symposium on Thermophysical Properties|
|Location of Event:||Univ Colorado, BOULDER, CO|
|Date(s) of Event:||JUN 22-27, 2003|
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