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Crystallization of a faceted primary phase in a stirred slurry

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Abstract

Stirring of an Al-19 pct Si alloy during primary solidification resulted in coarsening of the primary silicon particles relative to unstirred melts, although increasing rates of cooling or of stirring reduced the final particle size. The latter refinement is attributed to increasing rates of nucleation with higher cooling rate or shear rate. Crystal fragmentation may contribute to apparent nucleation rates. Coalescence of particles due to stirring was most pronounced at low fraction solid. Fragmentation was more probable at high fraction solid.

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Authors and Affiliations

  1. Comalco Research Centre, 3074, Thomastown, Victoria, Australia

    D. M. Smith (General Manager)

  2. Comalco Foundry Products, 3074, Thomastown, Victoria, Australia

    J. A. Eady (Managing Director)

  3. Department of Mining and Metallurgical Engineering, University of Queensland, 4072, Queensland, Australia

    L. M. Hogan (Hon. Research Associate)

  4. New Zealand Aluminium Smelter, Invercargill, New Zealand

    D. W. Irwin (Senior Development Engineer)

Authors
  1. D. M. Smith
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  2. J. A. Eady
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  3. L. M. Hogan
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  4. D. W. Irwin
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Smith, D.M., Eady, J.A., Hogan, L.M. et al. Crystallization of a faceted primary phase in a stirred slurry. Metall Trans A 22, 575–584 (1991). https://doi.org/10.1007/BF02656825

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  • DOI: https://doi.org/10.1007/BF02656825

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