Directional solidification of highly undercooled eutectic Ni 78.6Si21.4 alloy

Yiping Lu; Gencang Yang; Zengzhe Xi; Haipeng Wang; Yaohe Zhou

doi:10.1016/j.matlet.2005.01.022

Directional solidification of highly undercooled eutectic Ni _78.6Si_21.4 alloy

Yiping Lu
, Gencang Yang
, Zengzhe Xi
, Haipeng Wang
, Yaohe Zhou

School of Physical Science and Technology

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

15 Scopus citations

Abstract

The directional solidification of highly undercooled eutectic Ni _78.6Si_21.4 alloy is firstly achieved. In contrast with the conventional solidification, it occurs under a negative gradient at the solid/liquid interface. The essential condition for the processing is that the thermal diffusion in liquid plays a dominant role in the crystal growth. A directional solidification Ni₃Si dendrite structure is obtained at the undercooling of 72 K. The other directional solidification a-Ni dendrite is derived at the undercooling of 195 K. Thermodynamic modeling of homogeneous nucleation is applied in undercooled eutectic Ni_78.6Si_21.4 alloy. It is found that Ni₃Si is easier nucleation than a-Ni in undercooled eutectic Ni_78.6Si_21.4 melt. Calculated dendrite growth velocities confirm the predicted tendency of dendrite growth on the foundation of LKT/BCT theories.

Original language	English
Pages (from-to)	1558-1562
Number of pages	5
Journal	Materials Letters
Volume	59
Issue number	12
DOIs	https://doi.org/10.1016/j.matlet.2005.01.022
State	Published - May 2005

Keywords

Diffusion
Eutectic alloy
High undercooling
Solidification

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10.1016/j.matlet.2005.01.022

Cite this

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title = "Directional solidification of highly undercooled eutectic Ni 78.6Si21.4 alloy",

abstract = "The directional solidification of highly undercooled eutectic Ni 78.6Si21.4 alloy is firstly achieved. In contrast with the conventional solidification, it occurs under a negative gradient at the solid/liquid interface. The essential condition for the processing is that the thermal diffusion in liquid plays a dominant role in the crystal growth. A directional solidification Ni3Si dendrite structure is obtained at the undercooling of 72 K. The other directional solidification a-Ni dendrite is derived at the undercooling of 195 K. Thermodynamic modeling of homogeneous nucleation is applied in undercooled eutectic Ni78.6Si21.4 alloy. It is found that Ni3Si is easier nucleation than a-Ni in undercooled eutectic Ni78.6Si21.4 melt. Calculated dendrite growth velocities confirm the predicted tendency of dendrite growth on the foundation of LKT/BCT theories.",

keywords = "Diffusion, Eutectic alloy, High undercooling, Solidification",

author = "Yiping Lu and Gencang Yang and Zengzhe Xi and Haipeng Wang and Yaohe Zhou",

year = "2005",

month = may,

doi = "10.1016/j.matlet.2005.01.022",

language = "英语",

volume = "59",

pages = "1558--1562",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

number = "12",

}

TY - JOUR

T1 - Directional solidification of highly undercooled eutectic Ni 78.6Si21.4 alloy

AU - Lu, Yiping

AU - Yang, Gencang

AU - Xi, Zengzhe

AU - Wang, Haipeng

AU - Zhou, Yaohe

PY - 2005/5

Y1 - 2005/5

N2 - The directional solidification of highly undercooled eutectic Ni 78.6Si21.4 alloy is firstly achieved. In contrast with the conventional solidification, it occurs under a negative gradient at the solid/liquid interface. The essential condition for the processing is that the thermal diffusion in liquid plays a dominant role in the crystal growth. A directional solidification Ni3Si dendrite structure is obtained at the undercooling of 72 K. The other directional solidification a-Ni dendrite is derived at the undercooling of 195 K. Thermodynamic modeling of homogeneous nucleation is applied in undercooled eutectic Ni78.6Si21.4 alloy. It is found that Ni3Si is easier nucleation than a-Ni in undercooled eutectic Ni78.6Si21.4 melt. Calculated dendrite growth velocities confirm the predicted tendency of dendrite growth on the foundation of LKT/BCT theories.

AB - The directional solidification of highly undercooled eutectic Ni 78.6Si21.4 alloy is firstly achieved. In contrast with the conventional solidification, it occurs under a negative gradient at the solid/liquid interface. The essential condition for the processing is that the thermal diffusion in liquid plays a dominant role in the crystal growth. A directional solidification Ni3Si dendrite structure is obtained at the undercooling of 72 K. The other directional solidification a-Ni dendrite is derived at the undercooling of 195 K. Thermodynamic modeling of homogeneous nucleation is applied in undercooled eutectic Ni78.6Si21.4 alloy. It is found that Ni3Si is easier nucleation than a-Ni in undercooled eutectic Ni78.6Si21.4 melt. Calculated dendrite growth velocities confirm the predicted tendency of dendrite growth on the foundation of LKT/BCT theories.

KW - Diffusion

KW - Eutectic alloy

KW - High undercooling

KW - Solidification

UR - https://www.scopus.com/pages/publications/15544382833

U2 - 10.1016/j.matlet.2005.01.022

DO - 10.1016/j.matlet.2005.01.022

M3 - 文章

AN - SCOPUS:15544382833

SN - 0167-577X

VL - 59

SP - 1558

EP - 1562

JO - Materials Letters

JF - Materials Letters

IS - 12

ER -

Directional solidification of highly undercooled eutectic Ni _78.6Si_21.4 alloy

Abstract

Keywords

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