Uranium-plutonium interdiffusion at 750°C
| Autor: | Mark C. Petri, A.G. Hins, J.E. Sanecki, Mysore A. Dayananda |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Nuclear and High Energy Physics
Diffusion Radiochemistry Alloy Analytical chemistry chemistry.chemical_element Uranium engineering.material Thermal diffusivity Isothermal process Plutonium Nuclear Energy and Engineering chemistry Phase (matter) engineering General Materials Science Orthorhombic crystal system |
| Zdroj: | Journal of Nuclear Materials. 211:1-10 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/0022-3115(94)90275-5 |
| Popis: | An isothermal diffusion couple between pure uranium and a uranium-27 at% plutonium alloy was annealed at 750°C for 25 h. Composition profiles were determined from electron microanalyses, from which interdiffusion fluxes and interdiffusion coefficients were evaluated. The presence of plutonium greatly increases diffusion at this temperature over what would be predicted from uranium self-diffusion studies. Moreover, diffusivities in the body centered cubic U(γ) phase increase with increasing plutonium concentration, unlike interdiffusion in the orthorhombic U(α) phase at lower temperatures. The diffusion results suggest that plutonium has a greater intrinsic diffusivity than uranium at 750°C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|