Materials for Control of Water Cooled Power Reactors

whereas According to Eq. (21), the overall diffusivity is never greater than diffusivity in the solid phase and approaches zero as the porosity approaches the percolation limit, E = */3, above which, in a random composite, the solid phase would no longer be ~o n n e c t e d .~ This behavior is expected for the example considered. However, Eq. (22) yields the physically unacceptable prediction that the overall diffusion coefficient is =Dz ( > > > D , ) for porosities above lh, References ' R. Landauer, "Electrical ResistanceofBinaryMetallicMixtures,"J. Appl. Phys.. M. H. Cohen and J. Jortner, "Effective Medium Theory for the Hall Effect in a J. Jortner and M. H. Cohen, "Metal-Nonmetal Transition in Metal-Ammonia 23 [7] 779-84 (1952). Disordered Materials," Phys. Rev. Len., 30 [15] 6%-98 (1973). Solutions," J . Chem. Phys., 58 Ill] 5170-71 (1973). S. Kirkpatrick, Percolationand Conduction," Rev. Mod. Phys.. 45 [4]574-88 (1 071) \ . , , ' I . N. R;,Kestner and J. Jortner, "Conjecture on Electron Mobility in Liquid Hydro-H. T. Davis, L. R. Valencourt, and C. E. Johnson, "Transport Processes in 'See for example Samuel Glasstone, Textbook of Physical Chemistry, 2d ed.; pp. Per Kofstad, Nonstoichiomeay, Diffusion, and Electrical Conductivity in Binary carbons, J .The system HfO2-EuzO3 was investigated at =5 mol% intervals over a temperature range of %O" to 19WC, by X-ray analysisof quenched specimens. Liquidus temperature measurements made over the entire system showed the lowest liquidus temperfluorite solid solution region was also found to exist at higher

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Materials for Control of Water Cooled Power Reactors

Cited by 3 publications

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Quantification of history effects in PWR modelling

Quantification of history effects in PWR modelling

An investigation of the zirconia-gadolinia system

The System HfO₂‐Eu₂O₃

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Materials for Control of Water Cooled Power Reactors

Cited by 3 publications

References 0 publications

Quantification of history effects in PWR modelling

Quantification of history effects in PWR modelling

An investigation of the zirconia-gadolinia system

The System HfO2‐Eu2O3

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Product

Resources

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The System HfO₂‐Eu₂O₃