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Pb Segregation in SnPb eutectic solder alloy induced by gamma irradiation

  • Qilong Guan
  • , Chunjin Hang*
  • , Wei Zhang
  • , Shengli Li
  • , Xiaojiu Tang
  • , Dan Yu
  • , Ying Ding
  • , Xiuli Wang
  • , Guangdong Wu
  • , Gang Yao*
  • *Corresponding author for this work
  • Harbin Institute of Technology
  • CAS - Beijing Institute of Control Engineering
  • Heilongjiang Institute of Atomic Energy
  • Harbin Engineering University

Research output: Contribution to journalArticlepeer-review

Abstract

Pb segregated and formed a Pb segregation area in SnPb eutectic solder joint after 100 h of gamma irradiation. With the irradiation time increased to 150 h, Pb segregating stopped. The Pb segregation was attributed to the oxidation of β-Sn to SnO2 induced by the gamma irradiation. The Pb element content in the segregation area predicted by the segregation heat formulas is 53.5 %, which is consistent with the experimental result of 49.11 %. Density functional theory (DFT) calculation and Molecular dynamics (MD) simulation results were used to prove that the Pb segregation is caused by the oxidation of β-Sn.

Original languageEnglish
Article number112249
JournalCorrosion Science
Volume236
DOIs
StatePublished - 1 Aug 2024

Keywords

  • DFT calculation
  • Gamma irradiation
  • MD simulation
  • Pb segregation
  • SnPb eutectic solder joint

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