Chemical diffusion in the β phase of the Zr-Ti alloy system

Interdiffusion in β-Ti–Zr binary alloys

“…As observed in former diffusion studies in binary alloys Hf-Ti [46], Hf-Zr [48] and Ti-Zr at low temperature [49], all the diffusion profiles present a symmetric aspect, typical of diffusion coefficients that weakly depend on the composition. The position of the Matano interface remains confused with the initial welding interface, which is significant of an absence of Kirkendall effect.…”

“…Values of the activation energy are in the range of 250-350 kJ/mol with a curvature term G m 0 T 0 of about 100-150 MJ·K/mol. Some studies deal with interdiffusion in the binary Ti-Zr alloys mostly at low temperatures or for short concentration ranges [45,[49][50][51]. For example Raghunathan et al [49] have studied the interdiffusion as a function of the composition between 900 and 1170 • C: the interdiffusion coefficients lie between approximately 5 × 10 −10 and 1.4 × 10 −8 cm 2 /s.…”

Computational Study of Mobilities and Diffusivities in bcc Ti-Zr and bcc Ti-Mo Alloys

“…2 and 3, respectively, where the logarithm values are plotted against reciprocal temperature. It should be noted that the values from Raghunathan et al [25] in Fig. 3 are not included in the assessment process because they are extrapolated from interdiffusion coefficients and are not consistent with the results from other works.…”

“…[24] The calculated interdiffusion coefficients are generally in accordance with the experimental data at various temperatures. Figure 8 presents the comparison between the calculated and experimental interdiffusion coefficients from Raghunathan et al [25] and Bhanumurthy et al [26] at various temperatures. Although the experimental data are somewhat scattered, those values are generally distributed around the calculated lines, indicating the validity of the mobility parameters proposed in this work.…”

“…Raghunathan et al [25] carried out the interdiffusion study in diffusion couples made of Zr and Ti-Zr alloys. The diffusion couples were annealed at 1441, 1363, 1303, 1233, and 1174 K for enough time to form suitable concentration curves for chemical analysis.…”