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Ostwald ripening during solidification of nondendritic spherical structures

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Abstract

A theoretical model was introduced for the study of Ostwald ripening during solidification of the nondendritic spherical structure observed in Mg-Zn alloys grain-refined with Zr. This model assumed that: (1) particles are spherical; (2) each particle receives during solidification a mass increment proportional to its volume fraction with respect to the total volume of the particles in the system; (3) the Scheil equation applies. Experimental results agreed with analytical predictions on the time variation of the total solid-liquid interface area per unit volume and of the relative number of particles per unit volume.

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Whisler, N.J., Kattamis, T.Z. Ostwald ripening during solidification of nondendritic spherical structures. J Mater Sci 7, 888–894 (1972). https://doi.org/10.1007/BF00550436

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Keywords

  • Polymer
  • Theoretical Model
  • Time Variation
  • Unit Volume
  • Relative Number