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Analysis of Vacancy Agglomeration Processes by Matusita’s Method for B2 FeAl

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Abstract

In this study, the exothermic DSC peaks observed in rapidly-solidified Fe-44.9at.%Al ribbons and water-quenched Fe-48.5at.%Al single crystals were analyzed by Matusita’s method in order to discuss the kinetics of the agglomeration processes of supersaturated vacancies. Both the nucleation and morphological factors, n andm, respectively were approximately 3 for the rapidly solidified ribbons and were approximately 2 for the water-quenched single crystals. Based on the Matusita’s idea, them values suggest the growth of 3-dimensional voids in the rapidly solidified ribbons and the growth of 2-dimensional dislocations loops in the single crystals due to the agglomeration of supersaturated vacancies. In addition, then values suggest that the nuclei of voids and dislocation loops existed in as-quenched samples. These interpretations are in good agreement with the results of TEM observations.

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Authors and Affiliations

  1. Graduate School of Environmental Studies, Tohoku University, Sendai, 980-8579, Japan

    Kyosuke Yoshimi & Kouichi Maruyama

  2. Department of Materials Science and Engineering, University of Michigan, MI, 48109-2099, USA

    Masafumi Tsunekane

Authors
  1. Kyosuke Yoshimi
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  2. Masafumi Tsunekane
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  3. Kouichi Maruyama
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Yoshimi, K., Tsunekane, M. & Maruyama, K. Analysis of Vacancy Agglomeration Processes by Matusita’s Method for B2 FeAl. MRS Online Proceedings Library 1295, 177–182 (2011). https://doi.org/10.1557/opl.2011.528

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