Diffusion of Yttrium in Zirconium

Computational study of atomic mobility for the bcc phase of the U–Pu–Zr ternary system

“…Fig. 2 shows that the calculated self and tracer diffusivities of the U-Zr binary alloys compare favorably with the experimental data [10][11][12][13][14]. Comparison for the interdiffusion coefficients is shown in Fig.…”

“…The studies for the self-diffusion of bcc-Zr, by Patil [12] at 1200-1520 K and by Lundy et al [13] at 1174-2020 K, showed that the Arrhenius plot of the bcc-Zr self-diffusion is anomalously curved. Fedorov et al [14] studied the impurity diffusivity of 95 Zr in bcc-U and 235 U in bcc-Zr from 1073 to 1338 K, both of which were shown to follow a rigorous Arrehenius relation. Afterward, however, the same research group [15] reported the latter as a curved Arrehenius plot.…”

“…The experimental diffusion data for the bcc U-Zr alloys [10][11][12][13][14][15][16][17][18][19][20] are summarized in Table 1. The self-diffusivity of bcc-U was determined by Adda and Kirianenko [10] by using the lathe sectioning technique and by Bochvar et al [11] by a thin-layer sectioning technique.…”

“…There is some experimental diffusion data available for the U-Pu-Zr bcc alloys, including tracer, impurity, and interdiffusion coefficients [6,7,[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. In the subsections that follow, the data is evaluated system by system.…”

Estudio comparativo entre la difusión de U en Zry-4 y en Zr-α puro

“…La única medición previa hecha por FEDOROV et al [5] en un rango de temperaturas más cor-to (851 a 747 ºC) muestra una energía de activación no sólo menor al Q de auto-difusión, sino a la energía de formación de vacancias en el Ti-α, todo lo cual indica que los valores así medidos no se corresponden con D a dilución infinita sino con coeficientes de difusión efectivos en donde los valores de D en volumen están afectados por la presencia de caminos rápidos.…”