The effects of the addition of CNT@Ni on the hardness, density, wettability and mechanical properties of Sn-0.7Cu lead-free solder

Mao, Jianqin; Yang, Wenchao; Song, Qianqian; Lv, Yang; Jiang, Shiwei; Li, Yitai; Zhan, Yongzhong

doi:10.1007/s10854-021-05742-8

Cited by 3 publications

(4 citation statements)

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“…In addition, although CNTs have excellent electrical properties, they do not improve the conductivity of composite solders. Mao and co-workers reported that the conductivity and electrical conductivity of Sn-0.7Cu composite solder decreased to varying degrees with the change in Ni-CNT content, as shown in Figure 12 [34]. The change in conductivity can be explained by Matthiessen's Rule of Equation (1).…”

Section: Composite Solder Reinforced With Ni-cntsmentioning

confidence: 95%

“…Thus, CNTs can function as pinning sites. It has been reported that the yield strength of the composite solder was increased by 17.52% compared with the original Sn-0.7Cu solder when Ni-CNTs were added in an amount of 0.075 wt.% [34]. This is because when the addition amount is less than 0.075 wt.%, Ni-CNTs are dispersed in the solder as the second phase, effectively hindering the movement of dislocations.…”

Section: Strengthening Mechanism Of Cnt Composite Soldermentioning

confidence: 99%

Section: Composite Solder Reinforced With Ni-cntsmentioning

confidence: 99%

“…Then, it may be a good choice to replace Ni-CNTs with Ag-modified carbon nanotubes (Ag-CNTs). As for the recovery of electrical conductivity when the content increased from 0.075 to 0.1 wt.%, it may be caused by various reasons, such as the anisotropic structure between Ni-CNTs and solder, the excellent dispersion of Ni-CNTs, and the increased network structure [34]. Cu-CNTs were chosen as the reinforcing material because Cu not only has a wide range of applications in thermal and electrical transport but also can form Cu 6 Sn 5 and Cu 3 Sn IMCs with Sn to enhance the bonding with the solder matrix.…”

Section: Composite Solder Reinforced With Ni-cntsmentioning

confidence: 99%

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Effect of Carbon Nanotubes on the Mechanical, Thermal, and Electrical Properties of Tin-Based Lead-Free Solders: A Review

Li,

Qin,

Mai

et al. 2023

Crystals

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Carbon nanotubes (CNTs) are being applied with increasing frequency for advanced soldering. They have excellent mechanical, electrical, and thermal properties and are primarily used to reinforce lead-free solders. This paper discusses the strengthening mechanism of CNTs, introduces the preparation methods of CNT composite solders, and focuses on the review of tin-based lead-free solders reinforced with unmodified CNTs and metal-modified CNTs. The addition of CNTs can effectively improve the ultimate tensile strength, microhardness, shear strength, and creep resistance of the solder. However, the practical application of CNT composite solders has been a challenge for researchers for decades. The most significant issue is uniform dispersion due to the large density and surface differences between CNTs and solders. Other concerns are the structural integrity of CNTs and their limited addition amount, solder wettability, and interfacial bonding. CNT composite solders can only be widely used in a real sense when these challenges are properly addressed and overcome. At present, there is a lack of comprehensive reviews covering the structure, the strengthening mechanism, the preparation method of CNT composite solders, and the influence of CNT types on their strengthening effects. Therefore, this paper aims to fill this gap and contribute to solving the problems faced by the application of CNTs in solder. Future work is expected to focus on improving the dispersion and bonding of CNTs and optimizing the preparation method.

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Section: Composite Solder Reinforced With Ni-cntsmentioning

confidence: 95%

Section: Strengthening Mechanism Of Cnt Composite Soldermentioning

confidence: 99%

Section: Composite Solder Reinforced With Ni-cntsmentioning

confidence: 99%

Section: Composite Solder Reinforced With Ni-cntsmentioning

confidence: 99%

See 2 more Smart Citations