Abstract
The microstructure, IMCs layer and reliability of Sn-58Bi and Sn-58Bi-0.25Mo solder joints during thermal cycling were investigated. The results showed that the microstructure of Sn-58Bi and Sn-58Bi-0.25Mo solder joints is coarsened with increasing thermal cycling times and it is refined by adding Mo nanoparticles. The IMCs morphologies of Sn-58Bi and Sn-58Bi-0.25Mo solder joints are both changed to be flat and thick with increasing thermal cycling times and fewer voids are found in the IMCs layer of Sn-58Bi-0.25Mo solder joint than that of Sn-58Bi solder joint. The IMCs layer thickness of Sn-58Bi and Sn-58Bi-0.25Mo solder joints is increased with increasing thermal cycling times due to the formation of Cu6Sn5 and Cu3Sn compounds, and slow IMCs layer growth is obtained by Mo-reinforced solder joint during thermal cycling. The shear and tensile strength of Sn-58Bi-xMo (x = 0, 0.25) solder joints are both decreased with increasing thermal cycling times and the mechanical properties of Sn-58Bi solder joint are improved by adding Mo nanoparticles. The fracture mode of Mo contained composite solder joint is mixed with ductile and brittle fracture with lots of dimples, and it is changed to brittle fracture after 1200 thermal cycles with the reduction in dimples.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
