Silver-graphene nanosheets flux and ultrasound-assisted synergistic enhancement of Sn-3Ag-0.5Cu solder joints: Study on interfacial reactions, mechanical properties

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Vacuum Pub Date : 2025-08-01 Epub Date: 2025-03-06 DOI:10.1016/j.vacuum.2025.114223

Zhixiang Wu , Minming Zou , Wenjing Chen , Tao Xu , Xiongxin Jiang , Jue Wang , Sifan Tan , Jinghui Fan , Yanqing Lai , Yue Liu , Xiaowu Hu

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Abstract

This research successfully prepared a composite flux containing varying concentrations of silver nanoparticle-modified graphene nanosheets (Ag-GNSs) through chemical modification. Additionally, ultrasonic vibration (USV) was brought into reflow process for improvement of mechanical properties. The individual and combined effects of Ag-GNSs composite flux and USV on the shear performance and microstructure of Sn-3.5Ag-0.5Cu/Cu (SAC305/Cu) solder joints have been thoroughly investigated. The application of composite flux effectively restrained the growth of intermetallic compound (IMC), suppressed the coarsening of grain, improved the shear strength of soldered samples. Furthermore, the IMC layer continuously thickened with extended aging time, the sample with 0.1 wt% Ag-GNS addition maintained the thinnest IMC among all joint. After introduced of USV, the shear performance of the soldered joints is increased varies to different extents due to the refinement of grain size and thinning of IMC layer. With increasing concentrations of composite flux, the reflowed joints transformed from brittle-ductile mixed fracture to ductile fracture mode, while all the USV-treated joints remain ductile fracture mode.

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银-石墨烯纳米片助焊剂和超声辅助协同增强Sn-3Ag-0.5Cu焊点：界面反应和力学性能研究

本研究通过化学改性成功制备了含不同浓度银纳米颗粒修饰石墨烯纳米片（Ag-GNSs）的复合助焊剂。此外，在回流过程中引入超声振动（USV）来改善材料的力学性能。研究了Ag-GNSs复合助焊剂和USV对Sn-3.5Ag-0.5Cu/Cu （SAC305/Cu）焊点剪切性能和显微组织的单独和联合影响。复合助焊剂的应用有效地抑制了金属间化合物（IMC）的生长，抑制了晶粒的粗化，提高了焊接试样的抗剪强度。随着时效时间的延长，IMC层不断变厚，添加0.1 wt% Ag-GNS的样品IMC最薄。引入USV后，由于晶粒细化和IMC层变薄，焊接接头的抗剪性能有不同程度的提高。随着复合熔剂浓度的增加，再流接头由脆-韧混合断裂转变为韧性断裂模式，而usv处理的接头全部保持韧性断裂模式。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.