J Mater Sci Technol ›› 2006, Vol. 22 ›› Issue (04): 529-532.

• Research Articles • Previous Articles     Next Articles

Nano ZrO2 Particulate-reinforced Lead-Free Solder Composite

Jun SHEN, Yongchang LIU, Dongjiang WANG, Houxiu GAO   

  1. College of Materials Science & Engineering, Tianjin University, Tianjin 300072, China
  • Received:2005-06-23 Revised:2005-09-07 Online:2006-07-28 Published:2009-10-10
  • Contact: Jun SHEN

Abstract: A lead-free solder composite was prepared by adding ZrO2 nanopowders in eutectic Sn-Ag alloy. Microstructural features and microhardness properties of those solders with different ZrO2 nanopowder fraction were examined. Results indicate that the addition of ZrO2 nanopowders reduced the size of β-Sn grains and restrained the formation of bulk Ag3Sn intermetallic compounds (IMCs) due to the adsorption effect of the ZrO2 particles. The Vicker's hardness of the obtained lead-free solder composites fits well with the Hall-Petch relationship. The refinement of β-Sn grains favors to improve the microhardness of composite solders.

Key words: ZrO2 nanopowders, Microstructure, Composite solder, Microhardness