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Ag microflake-reinforced nano-Ag paste with high mechanical reliability for high-temperature applications

  • Fan Yang
  • Bo Hu
  • Ye Peng
  • Chunjin HangEmail author
  • Hongtao Chen
  • Changwoo Lee
  • Jun Wei
  • Mingyu LiEmail author
Article

Abstract

A silver (Ag) composite paste was fabricated based on Ag nanoparticles (NPs) and Ag microflakes (MFs). Robust interconnections were achieved after sintering in the temperature range of 150–225 °C. The shear strengths of the Ag MF + NP joints before and after thermal shock from − 50 to 150 °C for 1000 cycles were 155.7 ± 14.5 MPa and 78.4 ± 20.8 Mpa, respectively. The results show that the Ag composite paste not only has similar sintering properties to the Ag NP pastes but also exhibited superior mechanical reliability due to the addition of the Ag MFs. In addition, the sintered properties of different Ag pastes were discussed in terms of the coating organics, thermal behaviour and microstructure. The fracture modes after the shearing tests were analysed in detail. The Ag composite paste provides a potential solution for high-temperature applications.

Notes

Acknowledgements

We acknowledge financial support from the Shenzhen Science and Technology Plan Project under Grants Nos. JCYJ20160318095308401 and JCYJ20150529152949390 and the Guangzhou Science and Technology Plan Project under Grant No. 201604046029.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Advanced Welding and JoiningHarbin Institute of Technology at ShenzhenShenzhenChina
  2. 2.State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbinChina
  3. 3.Korea Institute of Industrial TechnologyIncheonSouth Korea

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