| Ag-Ni电接触材料快速/亚快速凝固过程研究 |
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| 引用本文： | 邓聪坤,江鸿翔,赵九洲.Ag-Ni电接触材料快速/亚快速凝固过程研究[J].特种铸造及有色合金,2020(1):30-33. |
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| 作者姓名： | 邓聪坤 江鸿翔 赵九洲 |
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| 作者单位： | 中国科学院金属研究所;中国科学院大学 |
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| 基金项目： | 国家自然科学基金资助项目(51771210)。 |
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| 摘 要： | 采用快速/亚快速凝固方法制备了富Ni相粒子弥散分布于Ag基体的Ag-Ni合金。建立了Ag-Ni合金凝固过程中组织演变的动力学模型,模拟计算了Ag-Ni合金凝固组织形成过程,分析讨论了合金成分对Ag-Ni合金凝固组织形成过程的影响。结果表明,合金的Ni含量越高,凝固组织中富Ni相粒子平均尺寸越大;Ag-Ni合金熔体冷却凝固时,富Ni相液滴/粒子的尺寸主要受形核和长大控制,Ostwald粗化作用很弱。
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| 关 键 词： | Ag-Ni合金 凝固 显微组织 模拟 |
Rapid/Sub-Rapid Solidification Process of Ag-Ni Electrical Contact Materials |
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| Deng Congkun,Jiang Hongxiang,Zhao Jiuzhou.Rapid/Sub-Rapid Solidification Process of Ag-Ni Electrical Contact Materials[J].Special Casting & Nonferrous Alloys,2020(1):30-33. |
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| Authors: | Deng Congkun Jiang Hongxiang Zhao Jiuzhou |
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| Affiliation: | (Institute of Metal Research,Chinese Academy of Sciences;University of Chinese Academy of Sciences) |
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| Abstract: | Ag-Ni alloys with Ni-rich particles uniformly dispersed in Ag matrix were prepared by rapid/sub-rapid solidification method.A model describing the microstructure evolution during cooling of Ag-Ni monotectic alloy melt was proposed.The solidification process of Ag-Ni alloy has been simulated and discussed in details.Effects of alloy composition on microstructure formation of Ag-Ni alloy were analyzed.The results demonstrate that the average radius of the Ni-rich particles is increased with the increase of nickel content.The Ostwald coarsening of the Ni-rich droplets/particles is very weak during the solidification process of a Ag-Ni alloy melt,which is controlled by nucleation and growth. |
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| Keywords: | Ag-Ni Alloy Solidification Microstructure Simulation |
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