Analyzing the cooperative growth of intermetallic phases with a curved solidification front

E. S. Nani, Britta Nestler, Kumar Ankit

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The classical Jackson-Hunt (JH) relation is re-derived to incorporate the physics of curved solid-liquid interfaces on the lamellar growth kinetics of binary intermetallic eutectics. A semi-analytical approach is adopted to explore the entire range of compositions within the miscibility gap. The interface shape calculation implemented in the classical theory is interpreted as a first step in an iterative process which can be carried through to convergence within the framework of the current extended analysis thus rendering the theory self-consistent and, except for the triple junction angles that have to be input, self-contained. The influence of the low péclet number approximation on the kinetics relation is thoroughly analyzed. It is found that the relative error in velocity due to this approximation scales with péclet number and is independent of the shape of the solid-liquid interface profile. Growth kinetics of NiZr-NiZr2 lamellar eutectics predicted by the modified theory are compared with those of the classical JH theory.

Original languageEnglish (US)
Pages (from-to)135-149
Number of pages15
JournalActa Materialia
Volume159
DOIs
StatePublished - Oct 15 2018

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Growth kinetics
Eutectics
Intermetallics
Solidification
Liquids
Physics
Solubility
Chemical analysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Analyzing the cooperative growth of intermetallic phases with a curved solidification front. / Nani, E. S.; Nestler, Britta; Ankit, Kumar.

In: Acta Materialia, Vol. 159, 15.10.2018, p. 135-149.

Research output: Contribution to journalArticle

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