Vibration fracture behavior of Sn-9Zn-xCu lead-free solders

Fei Yi Hung, Truan Sheng Lui, Li Hui Chen, Ji Ge You

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)


The effect of Cu content on the microstructure and the vibration deformation mechanisms of a potential lead-free solder, Sn-9Zn-xCu (x=0.2, 0.5, 0.7, 1.0wt.%), are examined in this study. Results show that Zn-rich phase and Sn-Zn eutectic decreased, while Cu-Zn intermetallic compound and proeutectic Sn-rich phase increased with increasing the Cu content. For the specimens with high Cu content (0.7Cu and 1.0Cu), hard massive Cu5Zn8 existed mostly amongst the proeutectic Sn-rich phase dendrites, and Zn-rich dispersed unevenly, leading to the deterioration in the tensile strength and ductility. Under a constant vibration force and constant initial-deflection testing, the high Cu specimen with a higher damping capacity was able to absorb more vibration energy and thus possessed a greater vibration fracture resistance. In addition, the lamellar-deformed structures (LDS) and Cu 5Zn8 were able to increase the crack tortuosity, which in turn increased the crack propagation resistance.

頁(從 - 到)3865-3873
期刊Journal of Materials Science
出版狀態Published - 2007 六月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 材料力學
  • 機械工業


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