This thesis presents a series of mechanical test methods and comprehensively investigates the deformation and damage behavior of Cu/Pb-free solder joints under different loading conditions. The fracture behavior of Pb-free joint interfaces induced by stress, deformation of solder and substrate are shown, the shear fracture strength of the Cu6Sn5 IMC is measured experimentally for the first time, and the dynamic damage process and microstructure evolution behavior of Pb-free solder joints are revealed intuitively. The thesis puts forward the argument that the local cumulative damage is the major cause of failure in solder joints. The research results provide the experimental and theoretical basis for improving the reliability of solder joints.
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Bismuth is a semimetallic element whose atoms act as scattering centers, leading to an increase in resistivity of Bi-enriched ... These scattering centers decrease the mean free path length of electron movement, which in turn leads to a ...
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... Song JH, Kim KJ (2014) IMC and creep behavior in lead-free solder joints of Sn–Ag and Sn–Ag–Cu alloy system by SP method. ... Zahran HY (2017) Investigation of microstructure and mechanical properties of Sn–xCu solder alloys.
[CrossRef] [PubMed] Li, Y.; Wong, C.P. Recent advances of conductive adhesives as a lead-free alternative in electronic ... mechanical and wetting properties of Sn-Ag-Cu lead-free solder with the addition of rare earth elements.
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Small appliances, including computers and printers, typically contain a mixture of about 35% steel, 20% other metals, and the balance a wide assortment of plastics, glass, wood, and textiles. While electronic waste is ...
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The experimental results show that the formation of intermetallics between lead-free solder and substrate compound ... has intrinsic brittleness the thick layer of IMC will result in reducing mechanical properties of the solder joint.
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