Hostname: page-component-77c89778f8-cnmwb Total loading time: 0 Render date: 2024-07-18T08:57:28.182Z Has data issue: false hasContentIssue false
  • English
  • Français

Double peritectic behavior of Ag–Zn intermetallics in Sn–Zn–Ag solder alloys

Published online by Cambridge University Press:  03 March 2011

Jenn-Ming Song  and
Kwang-Lung Lin
Jenn-Ming Song
Affiliation:
Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan, Republic of China
Kwang-Lung Lin*
Affiliation:
Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan, Republic of China
*
a)Address all correspondence to this author.e-mail: samsong@url.com.tw
Get access

Abstract

In the Sn–9Zn–xAg (x ranges from 0.5 to 3.0%) solder system, the Ag–Zn intermetallics start crystallizing as β–AgZn at about 300 °C. Subsequently, the solder experiences two peritectic transformations upon solidification. This results in the multiphase structural feature. The complicated crystallization process can be briefly described as L(liquid) → L + AgZn → L + AgZn + Ag5Zn8 → AgZn + Ag5Zn8 + AgZn3.

Keywords

Intermetallic alloyMicrostructurePhase transformation
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 9 , September 2004 , pp. 2719 - 2724
Copyright
Copyright © Materials Research Society 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Tu, P.T., Chan, Y.C. andLai, J.K.L.: Effect of intermetallic compounds on the shear fatigue of Cu/63Sn–37Pb solder joints. IEEE Trans. CPMT 20 87 (1997).Google Scholar
2.Pratt, R.E., Stromswold, E.I. andQuensnel, D.J.: Effect of solid-state intermetallic growth on the fracture toughness of Cu/63Sn–37Pb solder joints. IEEE Trans. CPMT 19 134 (1996).Google Scholar
3.Quan, L., Frear, D.R., Grivas, D. andMorris, J.W.: Tensile behavior of Pb-Sn solder/Cu joints. J. Electron. Mater. 16 203 (1987).CrossRefGoogle Scholar
4.Henderson, D.W., Gosselin, T.G., Sarkhel, A., Kang, S.K., Choi, W.K. andShih, D.Y.: Ag3Sn plate formation in the solidification of near ternary eutectic Sn–Ag–Cu alloys. J. Mater. Res. 17 2775 (2002).CrossRefGoogle Scholar
5.Yang, W., Messler, R.W. and Jr., : Microstructure evolution of eutectic Sn–Ag solder joints. J. Electron. Mater. 23 765 (1994).CrossRefGoogle Scholar
6.Mavoori, H., Chin, J., Vaynman, S., Moran, B., Keer, L. andFine, M.E.: Creep, stress relaxation, and plastic deformation in Sn–Ag and Sn–Zn eutectic solders. J. Electron. Mater. 41 783 (1997).CrossRefGoogle Scholar
7.Song, J.M., Lan, G.F., Lui, T.S. andChen, L.H.: Microstructure and tensile properties of Sn–9Zn–xAg lead free solder alloys. Scripta Mater. 48 1047 (2003).CrossRefGoogle Scholar
8.Song, J.M., Lan, G.F., Lui, T.S., and Chen, L.H.: Microstructural features and vibration fracture behavior of Sn–Zn–Ag solder alloys, in Proc. 4th International Symposium on Electronic Materials and Packaging, edited by Fu, S.L.IEEE-CPMT, Dec. 4–6, 2002, Kaohsiung, Taiwan.Google Scholar
9.Ohnuma, I., Miyashita, M., Liu, X.J., Ohtani, H. andIshida, K.: Phase equilibria and thermodynamic properties of Sn–Ag based Pb-free solder alloys. IEEE Trans. Electron. Packag. Manuf. 26 84 (2003).CrossRefGoogle Scholar
10.Ohnuma, I., Liu, X.J., Ohtani, H. andIshida, K.: Thermodynamic database for phase diagrams in micro-soldering alloys. J. Electron. Mater. 28 1164 (1999).CrossRefGoogle Scholar
11.Huang, C.W. andLin, K.L.: Microstructures and mechanical properties of Sn–8.55Zn–0.45A1-XAg solders. J. Mater. Res. 18 1528 (2003).CrossRefGoogle Scholar
12.Song, J.M. andLin, K.L.: Behavior of intermetallics in liquid Sn–Zn–Ag solder alloys. J. Mater. Res. 18 2060 (2003).CrossRefGoogle Scholar
13.Massalski, T.B.Binary Alloy Phase Diagrams (American Society for Metals, Metals Park, OH, 1986), Vol. 1.Google Scholar
14.Kitchingman, W.J. andBuckley, J.I.: Transformations in the β and ζ phases of the silver-zinc alloys. Acta Metall. 8 373 (1960).CrossRefGoogle Scholar
15.Orr, R.L. andRovel, J.: Thermodynamics of the structural modifications of AgZn. Acta Metall. 10 935 (1962).CrossRefGoogle Scholar
16.Hultgren, R., Desai, P.D., Hawkins, D.T., Gleioser, M. andKelley, K.K.Selected Values of Thermodynamic Properties of Binary Alloys (American Society for Metals, Metals Park, OH, 1973), p. 117.Google Scholar