Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/85249
Title: Effect of the size of carbon nanotubes (CNTs) on the microstructure and mechanical strength of CNTs-doped composite Sn0.3Ag0.7Cu-CNTs solder
Authors: Zhu, Ze
Chan, Yan-Cheong
Chen, Zhong
Gan, Chee-Lip
Wu, Fengshun
Keywords: Solder Joints
Carbon Nanotubes (CNTs)
Engineering::Materials
Issue Date: 2018
Source: Zhu, Z., Chan, Y.-C., Chen, Z., Gan, C.-L., & Wu, F. (2018). Effect of the size of carbon nanotubes (CNTs) on the microstructure and mechanical strength of CNTs-doped composite Sn0.3Ag0.7Cu-CNTs solder. Materials Science and Engineering: A, 727, 160-169. doi:10.1016/j.msea.2018.05.002
Series/Report no.: Materials Science and Engineering: A
Abstract: Carbon nanotubes (CNTs) with three different diameter ranges (10–20, 40–60, and 60–100 nm) were doped into tin-silver-copper (SAC) solder, to study the performance of the composite SAC-CNTs solder materials – as well as the effect of the size of the CNTs. It was found that all the CNTs-doped composite solder samples displayed refined microstructure, inhibited interfacial intermetallic compound (IMC) growth, and reinforced mechanical strength – while the melting point of the composite solder was close to that of the pristine solder. The reinforcement in mechanical strength was due to the doped CNTs pinned at the solder grain boundaries, which acted as second-phase particles that refined the microstructure and increased the dislocation density. The adsorbed CNTs destroyed the integrity of the interfacial IMCs, leading to reduced growth rate. Among these composite solders, CNTs with a diameter of 40–60 nm provided superior performance in refining the microstructure, lowering the IMC growth rate by 30.9% – and reinforcing the ball shear strength by 15.3% and the hardness by 16.1%. This size effect on the performance of composite solders was due to the various surface energy values for CNTs – that led to the agglomeration and adsorption of CNTs in the solder matrix and interfacial IMCs.
URI: https://hdl.handle.net/10356/85249
http://hdl.handle.net/10220/49190
ISSN: 0921-5093
DOI: 10.1016/j.msea.2018.05.002
Rights: © 2018 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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