Author:
Palancher Hervé,Martin Philippe,Nassif Vivian,Tucoulou Remi,Proux Olivier,Hazemann Jean-Louis,Tougait Olivier,Lahéra Eric,Mazaudier Fabrice,Valot Carole,Dubois Sylvie
Abstract
The systematic presence of the ternary phases U6Mo4Al43and UMo2Al20is reported in a U–Mo/Al interaction layer grown by thermal annealing. This work shows, therefore, the low Mo solubility in UAl3and UAl4binary phases; it contradicts the hypothesis of the formation of (U,Mo)Al3and (U,Mo)Al4solid solutions often admitted in the literature. Using µ-XAS (micro X-ray absorption spectroscopy) at the MoKedge and µ-XRD (micro X-ray diffraction), the heterogeneity of the interaction layer obtained on a γ-U0.85Mo0.15/Al diffusion couple has been precisely investigated. The UMo2Al20phase has been identified at the closest location from the Al side. Moreover, µ-XRD mapping performed on an annealed fuel plate enabled the characterization of the four phases resulting from the γ-U0.85Mo0.15/Al and (U2Mo + α-U)/Al interactions. A strong correlation between the concentrations of UAl4and UMo2Al20and those of UAl3and U6Mo4Al43has been shown.
Publisher
International Union of Crystallography (IUCr)
Subject
General Biochemistry, Genetics and Molecular Biology
Cited by
35 articles.
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