| 快速凝固三元共晶Au-19.25Ag-12.80Ge钎料合金的形核动力学 |
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| 引用本文： | 崔大田,钟素娟,宋克兴,耿进锋,王星星,龙伟民.快速凝固三元共晶Au-19.25Ag-12.80Ge钎料合金的形核动力学[J].稀有金属材料与工程,2021,50(6):1935-1940. |
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| 作者姓名： | 崔大田 钟素娟 宋克兴 耿进锋 王星星 龙伟民 |
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| 作者单位： | 华北水利水电大学 材料学院，河南 郑州 450045;郑州机械研究所 新型钎焊材料与技术国家重点实验室，河南 郑州 450001,郑州机械研究所 新型钎焊材料与技术国家重点实验室，河南 郑州 450001,河南科技大学 材料科学与工程学院，河南 洛阳 471023,国家电网河南省电力科学研究院，河南 郑州 450052,华北水利水电大学 材料学院，河南 郑州 450045,郑州机械研究所 新型钎焊材料与技术国家重点实验室，河南 郑州 450001 |
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| 摘 要： | 利用经典形核理论中孕育期计算公式对快速凝固Au-19.25Ag-12.80Ge三元共晶合金的形核进行了分析，得到了各相形核孕育期与熔体温度的关系。从计算结果可以看出，对于快速凝固Au-19.25Ag-12.80Ge钎料，AuAg固溶体的形核孕育期远短于Ge相，AuAg相优先析出，是快速凝固过程中的主要形核相。根据时间依存的瞬态形核理论，对连续冷却条件下的钎料合金临界形核温度、临界形核过冷度和临界形核数进行了计算。结果表明：触发熔体形核所需的初始形核过冷度随着冷却速度的增加而增大，同时临界形核数量也增加明显。
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| 关 键 词： | 钎料 快速凝固 孕育期 形核 |
| 收稿时间： | 2020/6/3 0:00:00 |
| 修稿时间： | 2020/9/25 0:00:00 |
Nucleation Dynamics of Rapidly Solidified Ternary Eutectic Au-19.25Ag-12.80Ge Brazing Filler |
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| Cui Datian,Zhong Sujuan,Song Kexing,Geng Jinfeng,Wang Xingxing and Long Weimin.Nucleation Dynamics of Rapidly Solidified Ternary Eutectic Au-19.25Ag-12.80Ge Brazing Filler[J].Rare Metal Materials and Engineering,2021,50(6):1935-1940. |
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| Authors: | Cui Datian Zhong Sujuan Song Kexing Geng Jinfeng Wang Xingxing and Long Weimin |
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| Affiliation: | School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;State Key Laboratory of Advanced Brazing Filler Metals & Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China,State Key Laboratory of Advanced Brazing Filler Metals & Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China,School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China,State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China,School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China,State Key Laboratory of Advanced Brazing Filler Metals & Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China |
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| Abstract: | The nucleation of rapidly solidified Au-19.25Ag-12.80Ge ternary eutectic alloy was analyzed and discussed according to the classical nucleation theory. Then the relationship between the incubation period of each phase and the melting temperature was obtained. The results show that for rapidly solidified Au-19.25Ag-12.80Ge brazing filler, the incubation period of AuAg solid solution is much shorter than that of Ge phase, and AuAg phase is precipitated preferentially as the main nucleation phase in the rapid solidification process. According to the time-dependent transient nucleation theory, the critical nucleation temperature, critical nucleation undercooling and critical nucleation number of the brazing filler were calculated under continuous cooling conditions. It can be seen that with increase of the cooling rate, the initial nucleation undercooling required to trigger melt nucleation increases, and the critical nucleation number increases substantially too. |
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| Keywords: | brazing filler rapidly solidified incubation period nucleation |
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