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Interdiffusion in the Al-V System in the 800-1000 °C Temperature Range.

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Title: Interdiffusion in the Al-V System in the 800-1000 °C Temperature Range.
Authors: Silveira, V. M.1 (AUTHOR) vitoria.melo.silveira@usp.br, Chaia, N.2 (AUTHOR) nabil.chaia@unifal-mg.edu.br, Borowski, K. E.1 (AUTHOR) karoline.borowski@usp.br, Ramos, A. S.2 (AUTHOR) alfeu.ramos@unifal-mg.edu.br, Ramos, E. C.2 (AUTHOR) erika.ramos@unifal-mg.edu.br, Nunes, C. A.1 (AUTHOR) cnunes@usp.br, Coelho, G. C.1 (AUTHOR) gilberto.coelho@usp.br
Source: Journal of Phase Equilibria & Diffusion. Feb2025, Vol. 46 Issue 1, p204-214. 11p.
Subjects: Liquid metal fast breeder reactors, Sodium cooled reactors, Diffusion coatings, Vanadium alloys, Liquid sodium
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 values in relation to those of the other two layers, considering the nominal temperatures (except for 1000 °C). [ABSTRACT FROM AUTHOR]
Copyright of Journal of Phase Equilibria & Diffusion is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Interdiffusion in the Al-V System in the 800-1000 °C Temperature Range.
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  Data: <searchLink fieldCode="AR" term="%22Silveira%2C+V%2E+M%2E%22">Silveira, V. M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> vitoria.melo.silveira@usp.br</i><br /><searchLink fieldCode="AR" term="%22Chaia%2C+N%2E%22">Chaia, N.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> nabil.chaia@unifal-mg.edu.br</i><br /><searchLink fieldCode="AR" term="%22Borowski%2C+K%2E+E%2E%22">Borowski, K. E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> karoline.borowski@usp.br</i><br /><searchLink fieldCode="AR" term="%22Ramos%2C+A%2E+S%2E%22">Ramos, A. S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> alfeu.ramos@unifal-mg.edu.br</i><br /><searchLink fieldCode="AR" term="%22Ramos%2C+E%2E+C%2E%22">Ramos, E. C.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> erika.ramos@unifal-mg.edu.br</i><br /><searchLink fieldCode="AR" term="%22Nunes%2C+C%2E+A%2E%22">Nunes, C. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> cnunes@usp.br</i><br /><searchLink fieldCode="AR" term="%22Coelho%2C+G%2E+C%2E%22">Coelho, G. C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gilberto.coelho@usp.br</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Phase+Equilibria+%26+Diffusion%22">Journal of Phase Equilibria & Diffusion</searchLink>. Feb2025, Vol. 46 Issue 1, p204-214. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Liquid+metal+fast+breeder+reactors%22">Liquid metal fast breeder reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Sodium+cooled+reactors%22">Sodium cooled reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion+coatings%22">Diffusion coatings</searchLink><br /><searchLink fieldCode="DE" term="%22Vanadium+alloys%22">Vanadium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Liquid+sodium%22">Liquid sodium</searchLink>
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  Data: 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 values in relation to those of the other two layers, considering the nominal temperatures (except for 1000 °C). [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Phase Equilibria & Diffusion is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11669-025-01179-2
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        Text: English
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        PageCount: 11
        StartPage: 204
    Subjects:
      – SubjectFull: Liquid metal fast breeder reactors
        Type: general
      – SubjectFull: Sodium cooled reactors
        Type: general
      – SubjectFull: Diffusion coatings
        Type: general
      – SubjectFull: Vanadium alloys
        Type: general
      – SubjectFull: Liquid sodium
        Type: general
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      – TitleFull: Interdiffusion in the Al-V System in the 800-1000 °C Temperature Range.
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              Text: Feb2025
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              Y: 2025
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