Interdiffusion in the Al-V System in the 800-1000 °C Temperature Range
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| Pubblicato in: | Journal of Phase Equilibria and Diffusion vol. 46, no. 1 (Feb 2025), p. 204 |
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| Autore principale: | |
| Altri autori: | , , , , , |
| Pubblicazione: |
Springer Nature B.V.
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| Soggetti: | |
| Accesso online: | Citation/Abstract Full Text Full Text - PDF |
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| Abstract: | Vanadium and its alloys have potential for application as fuel cladding in new fast breeder reactors cooled by sodium. Diffusion aluminide coatings could be a solution of choice in providing protection against high-temperature corrosion by liquid sodium or residual oxygen for these materials. In this work, multilayered coatings were formed on V and V-44Al substrates by halide activated pack cementation, using CrCl3 as transport agent and pure aluminum (high activity) as master alloy. Two types of diffusion couples, V/Al and V-44Al/Al, were investigated in order to determine the growth kinetics of the aluminide compounds in the 800-1000 °C temperature range. The growth of the saturated Vss as well as of the VAl3 and V5Al8 layers was controlled exclusively by solid state diffusion following a parabolic law, allowing the determination of the parabolic growth constants. Wagner’s analysis was adopted to calculate the integrated interdiffusion coefficients, resulting in values ranging approximately from 10−10 to 10−12 cm2/s for temperatures between 800 and 1000 °C. In general, VAl3 has the highest D~int<inline-graphic specific-use="web" mime-subtype="GIF" xlink:href="11669_2025_1179_Article_IEq1.gif" /> values in relation to those of the other two layers, considering the nominal temperatures (except for 1000 °C). |
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| ISSN: | 1547-7037 1934-7243 0197-0216 1054-9714 |
| DOI: | 10.1007/s11669-025-01179-2 |
| Fonte: | Materials Science Database |