Enhancement of Faceted Growth of Primary Al₃Ni Phase in High Magnetic Field

Abstract:

Faceted growth of primary Al₃Ni phase in the hypereutectic Al-Ni alloy in a high magnetic field was investigated. It was found that faceted growth of primary Al₃Ni phase was enhanced in the presence of the magnetic field. However, the fibrous to granular transition of Al-Al₃Ni eutectics occurred. The undercooling of primary and eutectic phases during solidification was measured using differential thermal analysis. It was showed that the undercooling of primary phase was hardly changed but that of eutectics markedly increased in the magnetic field. According to Cahn theory of crystal growth, the critical driving force was used to satisfactorily explain the morphology transition in the magnetic field.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 642-646
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.642
• Online since: August 2013
• Authors: Chuan Jun Li, Long Chen, Zhong Ming Ren
• Keywords: Faceted Growth, Magnetic Fields, Solid-Liquid Interface, Undercooling

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