Microstructural evolution of highly undercooled eutectic Ni78.6Si21.4 alloy

Y. P. Lu; G. C. Yang; C. L. Yang; H. P. Wang; Y. H. Zhou

doi:10.1016/S1006-7191(06)60022-7

Microstructural evolution of highly undercooled eutectic Ni_78.6Si_21.4 alloy

Y. P. Lu, G. C. Yang, C. L. Yang, H. P. Wang, Y. H. Zhou

School of Physical Science and Technology

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

Abstract

A large undercooling level up to 550 K (0.386 T_E) was achieved in eutectic Ni_78.6Si_21.4 melt by the combination of molten-glass and cyclic superheating. A microcrystalline structure is obtained at large undercooling. Surprisingly, the morphology of α(Ni) phase transits from the non-faceted phase to faceted phase at large undercooling of 390 K. Based on the classical nucleation theory and transient nucleation theory, the process of microstructure evolution and competitive nucleation was analyzed, and the refinement of crystal structure is determined by the high nucleation rate under large undercooling.

Original language	English
Pages (from-to)	43-50
Number of pages	8
Journal	Acta Metallurgica Sinica (English Letters)
Volume	19
Issue number	1
DOIs	https://doi.org/10.1016/S1006-7191(06)60022-7
State	Published - Feb 2006

Keywords

Eutectic
High undercooling
Molten-glass
Rapid solidification

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10.1016/S1006-7191(06)60022-7

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abstract = "A large undercooling level up to 550 K (0.386 TE) was achieved in eutectic Ni78.6Si21.4 melt by the combination of molten-glass and cyclic superheating. A microcrystalline structure is obtained at large undercooling. Surprisingly, the morphology of α(Ni) phase transits from the non-faceted phase to faceted phase at large undercooling of 390 K. Based on the classical nucleation theory and transient nucleation theory, the process of microstructure evolution and competitive nucleation was analyzed, and the refinement of crystal structure is determined by the high nucleation rate under large undercooling.",

keywords = "Eutectic, High undercooling, Molten-glass, Rapid solidification",

author = "Lu, {Y. P.} and Yang, {G. C.} and Yang, {C. L.} and Wang, {H. P.} and Zhou, {Y. H.}",

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AU - Lu, Y. P.

AU - Yang, G. C.

AU - Yang, C. L.

AU - Wang, H. P.

AU - Zhou, Y. H.

PY - 2006/2

Y1 - 2006/2

N2 - A large undercooling level up to 550 K (0.386 TE) was achieved in eutectic Ni78.6Si21.4 melt by the combination of molten-glass and cyclic superheating. A microcrystalline structure is obtained at large undercooling. Surprisingly, the morphology of α(Ni) phase transits from the non-faceted phase to faceted phase at large undercooling of 390 K. Based on the classical nucleation theory and transient nucleation theory, the process of microstructure evolution and competitive nucleation was analyzed, and the refinement of crystal structure is determined by the high nucleation rate under large undercooling.

AB - A large undercooling level up to 550 K (0.386 TE) was achieved in eutectic Ni78.6Si21.4 melt by the combination of molten-glass and cyclic superheating. A microcrystalline structure is obtained at large undercooling. Surprisingly, the morphology of α(Ni) phase transits from the non-faceted phase to faceted phase at large undercooling of 390 K. Based on the classical nucleation theory and transient nucleation theory, the process of microstructure evolution and competitive nucleation was analyzed, and the refinement of crystal structure is determined by the high nucleation rate under large undercooling.

KW - Eutectic

KW - High undercooling

KW - Molten-glass

KW - Rapid solidification

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JO - Acta Metallurgica Sinica (English Letters)

JF - Acta Metallurgica Sinica (English Letters)

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ER -

Microstructural evolution of highly undercooled eutectic Ni_78.6Si_21.4 alloy

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Keywords

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