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Analysis of Ostwald ripening in Ni-rich Ni-Ti alloys by diffusion couples

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Abstract

The coarsening kinetics of γ′ precipitates in Ni-rich Ni-Ti alloys are studied using a Ni-11.5 wt% Ti and pure Ni diffusion couple. The formed concentration gradient allowed to study the aging process at 1023 K (750 °C) in Ni-rich Ni-Ti alloys with Ti content from 8.62 to 11.15 wt% Ti. In general, during the coarsening of γ′ precipitates, the experimental coarsening kinetics do not fit well to the LSW or TIDC theoretical models and anomalous behaviour of coarsening rate constant (k r) associated with γ′ volume-fraction is confirmed at high values.

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Authors and Affiliations

  1. Instituto de Metalurgia, Universidad Autónoma de San Luis Potosí, Sierra leona 550, Col. Lomas 2 sección, México, 78210, SLP, México

    C. G. Garay-Reyes & J. J. Cruz-Rivera

  2. Instituto Politécnico Nacional, ESIME-AZC, Av. de las Granjas 682, Col. Sta. Catarina, 02550, México, DF, México

    F. Hernández-Santiago

  3. División de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, camino a la Presa San José 2055, Col. Lomas 4 sección, 78216, México, SLP, México

    N. Cayetano-Castro

  4. Centro de Investigación de Materiales Avanzados (CIMAV), Laboratorio Nacional de Nanotecnología, Miguel de Cervantes 120, ZC, 311109, Chihuahua, México

    R. Martínez-Sánchez & J. L. Hernández-Rivera

  5. Instituto Politécnico Nacional, ESIQIE-DIM, 118-556, DF, México, México

    H. J. Dorantes-Rosales

Authors
  1. C. G. Garay-Reyes
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  2. F. Hernández-Santiago
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  3. N. Cayetano-Castro
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  4. R. Martínez-Sánchez
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  5. J. L. Hernández-Rivera
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  6. H. J. Dorantes-Rosales
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  7. J. J. Cruz-Rivera
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Corresponding author

Correspondence to C. G. Garay-Reyes.

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Garay-Reyes, C.G., Hernández-Santiago, F., Cayetano-Castro, N. et al. Analysis of Ostwald ripening in Ni-rich Ni-Ti alloys by diffusion couples. Bull Mater Sci 37, 823–829 (2014). https://doi.org/10.1007/s12034-014-0012-7

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  • DOI: https://doi.org/10.1007/s12034-014-0012-7

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