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Soldering copper to aluminum with CU-Al2O3composite coatings deposited by cold spraying

  • Xingchao Mao*
  • , Jiahao Liu
  • , Jianqiang Wang
  • , Weiwei Zhang
  • , Xinjie Wang
  • , Fangcheng Duan
  • , Fengyi Wang
  • , Hongtao Chen
  • , Mingyu Li
  • , Ziwen Lv
  • *Corresponding author for this work
  • Harbin Institute of Technology (Shenzhen)
  • China Electronic Product Reliability and Environmental Testing Institute

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

During the cold spraying process, the copper particles were tightly deposited on the aluminum substrate with the help of Al2O3. The results reveal that the Cu-Al2O3 composite particles can produce a coating with a thickness of 70-80 μm under particular cold spraying process, proving the feasibility of cold sprayed copper coating for soldering. SAC305 and copper blocks were used for pressureless sintering on the cold sprayed composite copper coating, and the shear strength of the solder joint obtained by reacting at 250 °C for 2 min was 34.9 MPa, and the fracture path was inside the composite coating rather than the coating-substrate interface. The wettability of SAC305 solder paste on cold sprayed copper coating were also analyzed.

Original languageEnglish
Title of host publication2022 23rd International Conference on Electronic Packaging Technology, ICEPT 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665499057
DOIs
StatePublished - 2022
Externally publishedYes
Event23rd International Conference on Electronic Packaging Technology, ICEPT 2022 - Dalian, China
Duration: 10 Aug 202213 Aug 2022

Publication series

Name2022 23rd International Conference on Electronic Packaging Technology, ICEPT 2022

Conference

Conference23rd International Conference on Electronic Packaging Technology, ICEPT 2022
Country/TerritoryChina
CityDalian
Period10/08/2213/08/22

Keywords

  • Bonding mechanism
  • Cold spray
  • CuAlOcoating
  • Mechanical reliability
  • Soldering

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