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Effect of nano-Al2O3 particles on the microstructure and mechanical performance of melt-spun process Sn–3.5Ag composite solder

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Abstract

The addition of Al2O3 nanoparticles with 0.01, 0.03, 0.05, 0.07, and 0.1 wt% to eutectic solder Sn–3.5Ag was studied so as to be aware of the influence of Al2O3 addition as the particulate reinforcement to the microstructure, microhardness, and mechanical properties. By adding 0.1 wt% Al2O3 nanoparticles, the intermetallic compounds (IMCs; Ag3Sn) decreased from 95.55 to 45.22 nm. Additionally, the IMCs growth rates diminished by 30% to the plain solder. As a whole, the Al2O3 nanoparticles-embedded solder displayed better properties than plain solder in micro-creep and microhardness. Al2O3 nanoparticles fixed in the lead-free solder matrix impede the movement of dislocations by sticking and also stuck grain boundaries so as to enhance the mechanical properties of the lead-free solder matrix. The Sn–3.5Ag/Al2O3 lead-free solder showed improved properties compared with the traditional solder Sn63Pb37, which could substitute some Pb holding solder alloys in micro-electronic components and interconnections. The Scanning Electron Microscope (SEM) was carried out to study the morphology of the fabricated solders. The SEM revealed that the microstructure of solders was improved by do** Al2O3. According to X-ray diffraction analysis, the β-Sn (tetragonal phase) was formed as the main phase for all solders in addition to the peaks related to some intermetallic compound phase Ag3Sn. The results indicated that higher mechanical properties were obtained for composite solder Sn–3.5Ag/Al2O3 compared with plain solder. The melt-spun process is more resistant to indentation creep.

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Authors and Affiliations

  1. Metal Physics Laboratory, Physics Department, Faculty of Science, Mansoura University, P.O. Box 35516, Mansoura, Egypt

    Rizk Mostafa Shalaby

  2. Basic Science Department, Faculty of Engineering, Delta University, Gamasa, Egypt

    Hesham Elzanaty

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  1. Rizk Mostafa Shalaby
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  2. Hesham Elzanaty
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Correspondence to Rizk Mostafa Shalaby.

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Shalaby, R.M., Elzanaty, H. Effect of nano-Al2O3 particles on the microstructure and mechanical performance of melt-spun process Sn–3.5Ag composite solder. J Mater Sci: Mater Electron 31, 5907–5913 (2020). https://doi.org/10.1007/s10854-019-02821-9

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