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LI Qi, LIU Fengmei, ZHANG Xueyin, YI Yaoyong, GAO Haitao, LI Likun. Effect of Ni-CNTs reinforced particles on the microstructure and mechanical properties of Sn58Bi-0.1Er solder joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(7): 60-65. DOI: 10.12073/j.hjxb.20201221002
Citation: LI Qi, LIU Fengmei, ZHANG Xueyin, YI Yaoyong, GAO Haitao, LI Likun. Effect of Ni-CNTs reinforced particles on the microstructure and mechanical properties of Sn58Bi-0.1Er solder joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(7): 60-65. DOI: 10.12073/j.hjxb.20201221002
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Effect of Ni-CNTs reinforced particles on the microstructure and mechanical properties of Sn58Bi-0.1Er solder joints

  • Guangdong Provincial Key Laboratory of Advanced Welding Technology, China-Ukraine Institute of Welding, Guangdong Academy of Sciences Guangdong, Guangzhou, 510650, China

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  • Received Date: December 20, 2020
  • Available Online: August 30, 2021
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    • Abstract
  • Sn58Bi-0.1Er solder alloys with different Ni-CNTs content were prepared by vacuum melting method, and the effect of different Ni-CNTs content on the wettability of Sn58Bi-0.1Er composite solder on Cu substrate were studied. The interface structure morphology of the intermetallic compound at the joint interface and shear properties under different Ni-CNTs content were analyzed. The results show that when the addition of Ni-CNTs reinforcing particles is 0.01wt% − 0.05wt%, the wettability of the composite solder alloy on the Cu plate is improved, with the further increase of Ni-CNTs content, the wettability of the composite solder on the Cu plate began to show a downward trend. With the addition of Ni-CNTs, the Sn58Bi/Cu interface intermetallic compound transform from serrated Cu6Sn5 to thin layered (Cu, Ni)6Sn5. The addition of Ni-CNTs reinforcing particles can effectively reduce the thickness of the intermetallic compound layer. The addition of Ni-CNTs reinforced particles improves the shear force of the Sn58Bi/Cu joint. When the addition amount of Ni-CNTs is 0.1%, the maximum shear force of the joint is 432.86 N, which is more than twice the shear force of the Sn58Bi-0.1Er solder joint. The addition of Ni-CNTs reinforced particles effectively improves the mechanical properties of the Sn58Bi-0.1Er joint.
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