Ternary Eutectic Growth in a Highly Undercooled Liquid Alloy

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	RUAN Ying
	WANG Nan
	CAO Chong-De
	WEI Bing-Bo

关键词 ： 61.25.Mv, 68.55.Ac, 68.55.Jk

Abstract： The crystal nucleation and growth mechanism during the formation of Ag_42.4Cu_21.6Sb₃₆ ternary eutectic are investigated under substantial undercooling conditions. The x-ray diffraction analysis shows that the solidified eutectic phases are not involved (Ag) within a wide undercooling range of 6-114K. This indicates that under high undercooling condition, the phase constitution of Ag-Cu-Sb eutectic is different from that in the equilibrium phase diagram. With the increase of undercooling, the crystalline morphology of Ag_42.4Cu_x21.6Sb₃₆ alloy transforms from the mixed structure of primary θ(Cu₂Sb), two pseudobinary eutectics and (ε+θ+Sb) ternary eutectic into a unique (ε+θ+Sb) ternary eutectic. The calculated results indicate that θ(Cu₂Sb) is the leading nucleating phase among the three eutectic phases. In addition, the growth morphology of primary ε(Ag₃Sb) compound in Ag₆₀Cu₆Sb₃₄ alloy exhibits the characteristics of solid solution and its orthorhombic dendrite grows along the <111> directions.

Key words： 61.25.Mv 68.55.Ac 68.55.Jk

出版日期: 2004-08-01

:	61.25.Mv	(Liquid metals and alloys)
	68.55.Ac
	68.55.Jk

引用本文:

RUAN Ying;WANG Nan;CAO Chong-De;WEI Bing-Bo. Ternary Eutectic Growth in a Highly Undercooled Liquid Alloy[J]. 中国物理快报, 2004, 21(8): 1590-1592.
RUAN Ying, WANG Nan, CAO Chong-De, WEI Bing-Bo. Ternary Eutectic Growth in a Highly Undercooled Liquid Alloy. Chin. Phys. Lett., 2004, 21(8): 1590-1592.

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https://cpl.iphy.ac.cn/CN/ 或 https://cpl.iphy.ac.cn/CN/Y2004/V21/I8/1590