Volume 38 Issue 4
Aug.  2018
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Article Navigation >  Journal of Aeronautical Materials  > 2018  >  38(4): 101-108
Liukui GONG, Jinfa LIAO, Jihui YUAN, Guihe LI, Huiming CHEN. Effect of Rare Earth Y on Microstructure and Properties of Sn-58Bi Solder Alloy[J]. Journal of Aeronautical Materials, 2018, 38(4): 101-108. doi: 10.11868/j.issn.1005-5053.2018.000007
Citation: Liukui GONG, Jinfa LIAO, Jihui YUAN, Guihe LI, Huiming CHEN. Effect of Rare Earth Y on Microstructure and Properties of Sn-58Bi Solder Alloy[J]. Journal of Aeronautical Materials, 2018, 38(4): 101-108. 10.11868/j.issn.1005-5053.2018.000007
shu

Effect of Rare Earth Y on Microstructure and Properties of Sn-58Bi Solder Alloy

doi: 10.11868/j.issn.1005-5053.2018.000007
  • 1.

    School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China

  • 2.

    Institute of Engineering Research, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China

  • 3.

    Jiangxi Nonferrous Metal Processing Engineering Technology Research Center, Ganzhou 341000, Jiangxi, China

  • 4.

    Jiangsu Dingsheng New Energy Materials Co., LTD., Zhenjiang 212141, Jiangsu, China

  • Received Date: 2018-01-01
  • Rev Recd Date: 2018-04-17
  • Publish Date: 2018-08-01
    Abstract
  • Sn-58Bi-xY alloys with different Y contents (x = 0.0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5% (mass fraction, the same below )) were fabricated in a vacuum furnace in nitrogen atmosphere. Microstructure, phase composition, melting characteristic, wettability and hardness of the alloys were investigated, and the influence of the rare earth Y on the formation of intermetallic compound among Sn-58Bi/Cu were analyzed, and the shear strength were test. The results show that the Sn-Bi microstructure is refined, and the microstructure of Sn-58Bi-xY is rich in Sn phase, Bi phase and eutectic microstructure of layered structure. The rare earth Y is distributed in rich Bi phase evenly. The melting points and melting ranges are less affected with the Y addition. The wettability of Sn-58Bi alloys reduces when the Y contents increase, but the hardness of Sn-58Bi alloys increases and reaches the maximum value 24.18HV when the content of Y is 0.4%. Rare earth Y can improve the shear strength of Sn-58Bi-xY/Cu solder joints, and the shear strength of the joints reach the maximum value 53.55 MPa when the content of Y is 0.2%. Y can promote the reaction of Sn-58Bi solder with Cu during welding and forming Cu6Sn5 intermetallic compound.

     

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