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Theory of layered-structure formation in peritectic systems

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Abstract

Two-phase growth in a peritectic system has been examined, and a theoretical model is developed for the formation of a layered structure in which two phases form alternate layers that are oriented parallel to the interface. The width of each layer and the spacing between layers have been shown to be inversely proportional to velocity, and the proportionality constants depend upon the nucleation temperatures for the two phases. The nucleation temperatures for the two phases are shown to play a critical role in the formation and stability of layered structures. The range of compositions over which layered structures can form is identified, and it is shown that convection effects in the liquid will destabilize the layered structure. Several key experimental studies have been identified to evaluate minimum undercoolings required for the nucleation of each of the two phases. The morphology of the transition interface is shown to depend upon the relative effects of nucleation and growth of the two phases.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Iowa State University, 50011, Ames, IA

    R. Trivedi (Professor Senior Scientist)

  2. Ames Laboratory of the United States Department of Energy, Iowa State University, 50011, Ames, IA

    R. Trivedi (Professor Senior Scientist)

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  1. R. Trivedi
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Trivedi, R. Theory of layered-structure formation in peritectic systems. Metall Mater Trans A 26, 1583–1590 (1995). https://doi.org/10.1007/BF02647608

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  • DOI: https://doi.org/10.1007/BF02647608

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