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Rapid eutectic growth: from rod growth to diffusionless solidification.

Peter K Galenko1,2, Junfeng Xu1,3

  • 1Otto Schott Institute of Materials Research, Friedrich-Schiller-Universität Jena, 07743, Germany.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|January 3, 2022
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Summary
This summary is machine-generated.

Rapid solidification of eutectic systems forms metastable phases due to diffusionless growth. This study models atomic diffusion in rod eutectics, simplifying calculations for crystal growth velocity.

Keywords:
diffusionlesseutectic growthrodsolidification

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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Solidification Science

Background:

  • Rapid solidification of eutectic systems often results in metastable solid phases.
  • This phenomenon is attributed to diffusionless (chemically partitionless) solidification at high crystal growth velocities, suppressing normal eutectic decomposition.

Purpose of the Study:

  • To develop a model for diffusionless growth analyzing atomic diffusion in rod eutectic systems.
  • To derive a simplified calculation method for Bessel function-related equations in rod eutectic growth.

Main Methods:

  • Development of a mathematical model for diffusionless growth.
  • Analysis of atomic diffusion within rod eutectic couples.
  • Derivation of a simplified calculation method for Bessel function equations.

Main Results:

  • A model for diffusionless growth and atomic diffusion in rod eutectics was established.
  • A simplified calculation method for Bessel function equations in eutectic growth was obtained.
  • The method is applicable to various rod eutectic growth models.

Conclusions:

  • Diffusionless growth is key to metastable phase formation in rapidly solidified eutectics.
  • The developed model and simplified calculation method enhance the understanding and prediction of eutectic solidification.
  • This work contributes to the study of transport phenomena in complex systems.