Rapid/Sub-Rapid Solidification Process of Ag-Ni Electrical Contact Materials

Deng Congkun; Jiang Hongxiang; Zhao Jiuzhou

doi:10.15980/j.tzzz.2020.01.007

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Rapid/Sub-Rapid Solidification Process of Ag-Ni Electrical Contact Materials
Vol. 40, Issue 1, Pages: 30-33(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.01.007

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[1]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,2020,40(01):30-33.

Deng Congkun, Jiang Hongxiang, Zhao Jiuzhou. Rapid/Sub-Rapid Solidification Process of Ag-Ni Electrical Contact Materials. [J]. Special Casting & Nonferrous Alloys 40(1):30-33(2020)
[1]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,2020,40(01):30-33. DOI： 10.15980/j.tzzz.2020.01.007.

Deng Congkun, Jiang Hongxiang, Zhao Jiuzhou. Rapid/Sub-Rapid Solidification Process of Ag-Ni Electrical Contact Materials. [J]. Special Casting & Nonferrous Alloys 40(1):30-33(2020) DOI： 10.15980/j.tzzz.2020.01.007.

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。

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.