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Kinetics of Pressureless Infiltration of Al-Mg Melts into Porous Alumina Preforms

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Abstract

Effective “hydrodynamic” radii governing infiltration kinetics of reactive Al-Mg melts into alumina preforms were found to be three orders of magnitude smaller than the average pore size of the packed bed and also smaller compared with the kinetics for a nonreactive system. A sinusoidal capillary model was developed to predict flow kinetics within the packed bed. For the reactive system, two factors were ascribed for additional melt retardation: (1) different intrinsic wettabilities of the two liquids on alumina, thereby leading to significantly different “effective” local contact angles; and (2) local solute depletion from the meniscus, which was incorporated as a time-dependent contact angle.

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Acknowledgments

We are thankful to Saswata Bhattacharyya (Department of Materials Engineering, IISc) for development of the numerical model and analysis. Financial support for this work was provided by the Volkswagen Foundation through a grant for a collaborative project with TU-Darmstadt, Germany.

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Authors and Affiliations

  1. Department of Materials Engineering, Indian Institute of Science, Bangalore, 560012, India

    Debdutt Patro (Research Scholar, Research Engineer) & Vikram Jayaram (Professor)

  2. Material Mechanics Lab, John F. Welch Technology Center, General Electric, Bangalore, 560066, India

    Debdutt Patro (Research Scholar, Research Engineer)

Authors
  1. Debdutt Patro
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  2. Vikram Jayaram
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Correspondence to Debdutt Patro.

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Manuscript submitted September 28, 2007.

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Patro, D., Jayaram, V. Kinetics of Pressureless Infiltration of Al-Mg Melts into Porous Alumina Preforms. Metall Mater Trans B 39, 108–115 (2008). https://doi.org/10.1007/s11663-007-9111-9

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  • DOI: https://doi.org/10.1007/s11663-007-9111-9

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