Synthesis and Structural Characterization of U-Zr-Nb Alloys
AUTOR(ES)
Ferreira, Ailton da Silva, Longen, Fábio Rogério, Gotardo, Ricardo Augusto Mascarello, Ivashita, Flávio Francisco, Barco, Reginaldo, Paesano Júnior, Andrea
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
16/10/2017
RESUMO
U-xZr-yNb alloys with values of x varying from 32% to 50% (wt.%Zr) and y varying from 6% to 10% (wt.%Nb) were produced by the arc melting technique. The effect of the addiction of zirconium and niobium on the phase stabilization of γ-U, lattice parameter, microstructure and elemental composition were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscope (EDS) techniques. The alloys crystallized in a cubic symmetry composed by a γ-U(Zr,Nb) matrix and β-Zr small precipitates, when the content of zirconium and niobium is up to 55 wt.%. With further additions, e.g. 60 wt.%, was observed a highly enriched macrosegregation of β-Zr. It was also observed that the cell size of the γ-U(Zr,Nb) phase increase with the addition of Zr and Nb. The lattice parameter curve behavior as a function of zirconium and niobium deviates from a linear behavior at around x ≈ 50 and y ≈ 10 wt.%.
Documentos Relacionados
- Aplicação de espectroscopia de fotoelétrons ao estudo de processos de corrosão e oxidação de superfícies metálicas: Inconel 182, Fe/Cu(100) e U-Zr-Nb
- ESTUDO DA TRANSFORMAÇÃO DE FASES DAS LIGAS U-2,5Zr-7,5Nb E U-3Zr-9Nb TRATADAS TERMICAMENTE A 600 C E DA COMINUIÇÃO PELO PROCESSO DE HIDRETAÇÃO-DESIDRETAÇÃO
- Hydrogen Kinetics and Hydride Formation Effect on Zr-1Nb and Zr-1Nb-1Sn-0.1Fe Alloys for Nuclear Application
- Study of the non-linear stress-strain behavior in Ti-Nb-Zr alloys
- Diffusion and anelastic relaxation due to hydrogen in solid solution in Nb-Ti and Nb-Zr alloys.