电焊机2024，Vol.54Issue(10)：32-41,10.DOI:10.7512/j.issn.1001-2303.2024.10.04
稀土Ce对高性能硅白铜焊料组织、析出和性能的影响规律研究
Research on the Influence of Ce on the Microstructure,Precipitation and Properties of High-performance Silicon White Copper Solder
摘要
Abstract
The aim of this paper is to study the influence of Ce-group rare earth elements on the solidification structure,solid solution structure,aging precipitation behavior,and properties of high-performance silicon white copper solder.Scanning electron microscopy(SEM),transmission electron microscopy(TEM),and electron probe microanalysis(EPMA)were used to observe the microstructure and test the properties of Cu-Ni-Si solders with different Ce contents.The results show that the addition of Ce-group rare earth elements significantly refines the solidification structure of the silicon white copper solder,reducing the grain size from 200 μm to 40 μm after addition.The addition of Ce elements inhibits the solid solution recrystal-lization process of the solder and refines the recrystallized grain size,increasing the recrystallization temperature from 900℃to 950℃and reducing the recrystallized grain size from 180 μm to 90 μm.The addition of Ce elements can promote the precipitation of Ni and Si elements and inhibit the growth of precipitated phases during the over-aging stage,but it does not change the type of aging precipitated phases,which are disk-shaped δ-Ni2Si and rod-shaped β-Ni3Si.The Cu-3.2Ni-0.75Si-0.06Ce silicon white copper solder achieves the best performance after aging at 450℃for 4 h,with a tensile strength of 747 MPa and a shear strength of 454 MPa.Compared to the Cu-3.2Ni-0.75Si solder without Ce elements,the tensile strength is increased by 117 MPa,an increase of 18.6%,and the shear strength is increased by 91 MPa,an increase of 25%.关键词
硅白铜焊料/Ce元素/固溶处理/时效析出/抗拉强度Key words
silicon white copper solder/Ce element/solution treatment/aging precipitation/tensile strength分类
矿业与冶金引用本文复制引用
贾飞,赵丹,程战,樊志斌,宁少晨,李小亮..稀土Ce对高性能硅白铜焊料组织、析出和性能的影响规律研究[J].电焊机,2024,54(10):32-41,10.基金项目
河南省重大关键技术揭榜攻关项目(191110111000) （191110111000）
宁波市"3315"人才计划2020年创新团队C类 （）
