Abstract
Effects of Pr addition on wettability, microstructure of Sn3.8Ag0.7Cu solder were studied, the mechanical properties of solder joints were investigated and the fracture morphologies were also analyzed in this paper. The results indicate that adding appropriate amount of Pr can evidently improve the wettability of solder, and it is also found that Pr can refine the β-Sn dendrites and reduce the intermetallic compounds growth inside the solder due to the fine PrSn3 particles formed in the solder which can act as heterogeneous nucleation sites. Moreover, the joints soldered with the SnAgCuPr solders possess sound mechanical properties which may result from the finer microstructure improved by the Pr.
Similar content being viewed by others
References
S.T. Kao, J.G. Duh, Effect of Cu concentration on morphology of Sn-Ag-Cu solders by mechanical alloying. J. Electron. Mater. 33(12), 1445–1451 (2004)
C.M.T. Law, C.M.L. Wu, D.Q. Yu, L. Wang, J.K.L. Lai, Microstructure, solderability, and growth of intermetallic compounds of Sn-Ag-Cu-RE lead-free solder alloys. J. Electron. Mater. 35(1), 89–93 (2006)
K.S. Kim, S.H. Huh, K. Suganuma, Effects of intermetallic compounds on properties of Sn-Ag-Cu lead-free soldered joints. J. Alloys Compd. 352(1–2), 226–236 (2003)
B.Y. Wu, H.W. Zhong, Y.C. Chan, M.O. Alam, Degradation of Sn37Pb and Sn3.5Ag0.5Cu solder joints between Au/Ni (P)/Cu pads stressed with moderate current density. J. Mater. Sci. Mater. Electron. 17(11), 943–950 (2006)
F.J. Cheng, F. Gao, H. Nishikaw, T. Takemoto, Interaction behavior between the additives and Sn in Sn-3.0Ag-0.5Cu-based solder alloys and the relevant joint solderability. J. Alloys Compd. 472(1–2), 530–534 (2009)
C.M.L. Wu, Y.W. Wong, Rare-earth additions to lead-free solders. J. Mater. Sci. Mater. Electron. 18(1–3), 77–91 (2007)
C.M.L. Wu, D.Q. Yu, C.M.L. Law, L. Wang, Properties of lead-free solder alloys with rare earth element additions. Mater. Sci. Eng. R Rep. 44(1), 1 (2004)
M.A. Dudek, R.S. Sidhu, N. Chawla, M. Renavikar, Microstructure and mechanical behavior of novel rare earth-containing Pb-free solders. J. Electron. Mater. 35(12), 2088–2097 (2006)
L. Zhang, S.B. Xue, L.L. Gao, Y. Chen, S.L. Yu, Z. Sheng, G. Zeng. Effect of trace amount addition of rare earth on properties and microstructure of Sn-Ag-Cu alloys. J. Mater. Sci. Mater. Electron. 20(12), 1193–1199 (2009)
J.X. Wang, S.B. Xue, Z.J. Han, S.L. Yu, Y. Chen, Y.P. Shi, H. Wang, Effect of rare earth Ce on microstructures, solderability of Sn-Ag-Cu and Sn-Cu-Ni solders as well as mechanical properties of soldered joints. J. Alloys Compd. 467(1–2), 219–226 (2009)
Y.C. Zhou, Q.L. Pan, Y.B. He, W.J. Liang, W.B. Li, Y.C. Li, C.G. Lu. Microstructures and properties of Sn-Ag-Cu lead-free solder alloys containing La. Trans. Nonferr. Met. Soc. China. 17(2), 1043–1048 (2007)
Y.W. Shi, J. Tian, H. Hao, Z.D. Xia, Y.P. Lei, F. Guo. Effects of small amount addition of rare earth Er on microstructure and property of SnAgCu solder. J. Alloys Compd. 453(1–2), 180–184 (2008)
H. Hao, J. Tian, Y.W. Shi, Y.P. Lei, Z.D. Xia, Properties of Sn3.8Ag0.7Cu solder alloy with trace rare earth element Y additions. J. Electron. Mater. 36(7), 766–774 (2007)
L.L. Gao, S.B. Xue, L. Zhang, Z. Sheng, G. Zeng, F. Ji. Effects of trace rare earth Nd addition on microstructure and properties of SnAgCu solder. J. Mater. Sci. Mater. Electron. doi:10.1007/s10854-009-9970-8
D.Q. Yu, J. Zhao, L. Wang. Improvement on the microstructure stability, mechanical and wetting properties of Sn-Ag-Cu lead-free solder with the addition of rare earth elements. J. Alloys Compd. 376(1–2), 170–175 (2004)
B. Li, Y.W. Shi, Y.P. Lei, F. Guo, Z.D. Xia, B. Zong, Effect of rare earth element addition on the microstructure of Sn-Ag-Cu solder joint. J. Electron. Mater. 34(3), 217–224 (2005)
N.Y. Chen, Bond-parametric function and its applications[M] (Science Press, Peking, 1976), p. 15
Acknowledgments
The present work was carried out with the support of the Jiangsu General Colleges and Universities Postgraduate Scientific Research Innovative Plan (Project No. CX09B_074z); support of Nanjing University of Aeronautics and Astronautics Doctoral Dissertation Innovation and Excellence Producing foundation (Project No. BCXJ09-07).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Gao, L., Xue, S., Zhang, L. et al. Effect of praseodymium on the microstructure and properties of Sn3.8Ag0.7Cu solder. J Mater Sci: Mater Electron 21, 910–916 (2010). https://doi.org/10.1007/s10854-009-0017-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10854-009-0017-y