The formation of quasiregular microstructure in highly undercooled Ni 70.2Si29.8 eutectic alloy

Yiping Lu; Xin Lin; Gencang Yang; Junjie Li; Yaohe Zhou

doi:10.1063/1.2955723

The formation of quasiregular microstructure in highly undercooled Ni _70.2Si_29.8 eutectic alloy

Yiping Lu, Xin Lin, Gencang Yang, Junjie Li, Yaohe Zhou

材料学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

16 引用（Scopus）

摘要

High undercooling (about 392 K) was achieved in bulk eutectic Ni _70.2Si_29.8 alloy melt using glass fluxing combined with cyclic superheating. Surprisingly, the microstructure of eutectic Ni _70.2Si_29.8 transits from irregular to quasiregular when the undercooling exceeds 340 K. The morphology transition at large undercooling is analyzed based on the solution entropy of eutectic phases. The forming process of quasiregular microstructure is ascribed to a transition from faceted-faceted to nonfaceted-nonfaceted eutectic concurring with increased undercooling.

源语言	英语
文章编号	013535
期刊	Journal of Applied Physics
卷	104
期	1
DOI	https://doi.org/10.1063/1.2955723
出版状态	已出版 - 2008

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10.1063/1.2955723

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AU - Lu, Yiping

AU - Lin, Xin

AU - Yang, Gencang

AU - Li, Junjie

AU - Zhou, Yaohe

PY - 2008

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AB - High undercooling (about 392 K) was achieved in bulk eutectic Ni 70.2Si29.8 alloy melt using glass fluxing combined with cyclic superheating. Surprisingly, the microstructure of eutectic Ni 70.2Si29.8 transits from irregular to quasiregular when the undercooling exceeds 340 K. The morphology transition at large undercooling is analyzed based on the solution entropy of eutectic phases. The forming process of quasiregular microstructure is ascribed to a transition from faceted-faceted to nonfaceted-nonfaceted eutectic concurring with increased undercooling.

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