Thermal aging effects on microstructures and mechanical properties of an environmentally friendly eutectic tin-copper solder alloy
MetadataShow full item record
This paper describes the changes in microstructures and their effects on property degradations in an environmentally friendly eutectic [Formula presented].7Cu (wt.%) solder alloy when subjected to harsh service conditions. A thorough microscopy investigation was conducted by scanning electron microscopy (SEM), electron backscattered diffraction (EBSD) and diffraction analysis with transmission electron microscopy (TEM). In the as-received alloy Cu6Sn5 intermetallic compound (IMC) particles are dispersed in the grain interiors and grain boundaries of ß-Sn matrix. When the alloy was exposed for 60 days at 150 °C, the size of Cu6Sn5 IMC particles and Sn matrix grains were increased significantly. As a result the mechanical reliability of electronic interconnections turned inferior. This was confirmed by measuring a range of electrical and mechanical properties that include electrical resistivity, Young's moduli, shear moduli, microhardness and nano indentation creep behaviour. A comparison between the as-received and age-treated alloy shows that the degradation in Young's and shear moduli was about 10.6 and 9.9%, respectively, and that in hardness was about 25%. However the age treatment improved the damping property of the alloy.
Showing items related by title, author, creator and subject.
Investigation of the production and mechanical properties of porous Beta Titanium alloy compacts prepared by powder metallurgy processes for biomedical applicationsNugroho, Aris Widyo (2013)Titanium and its alloys are known to be widely used for biomedical applications due to their biocompatibility, and excellent corrosion resistance. The introduction of porosity into the metals may reduce the stiffness to ...
Microstructural evolution and final properties of a cold-swaged multifunctional Ti-Nb-Ta-Zr-O alloy produced by a powder metallurgy routeGuo, W.; Quadir, Md Zakaria; Moricca, S.; Eddows, T.; Ferry, M. (2013)Body centred cubic (BCC) ß-phase multifunctional titanium alloys have been developed with a very unique combination of thermal and mechanical properties. In this investigation, a very low porosity Ti-36.8-Nb-2.7Zr-2.0Ta-0.44O ...
Aruga, Y.; Saxey, David; Marquis, E.; Shishido, H.; Sumino, Y.; Cerezo, A.; Smith, G. (2009)In this study, the ultrafine structures in Cu-P and Cu-Ni-P alloys have been characterized using a three-dimensional atom probe (3DAP) and transmission electron microscopy (TEM), and the stress relaxation behavior of these ...