Intermetallic Formation and Fluidity in Sn-Rich Sn-Cu-Ni Alloys

Gourlay, C. M., Nogita, K., Read, J. and Dahle, A. K. (2010) Intermetallic Formation and Fluidity in Sn-Rich Sn-Cu-Ni Alloys. Journal of Electronic Materials, 39 1: 56-69. doi:10.1007/s11664-009-0962-5

Author Gourlay, C. M.
Nogita, K.
Read, J.
Dahle, A. K.
Title Intermetallic Formation and Fluidity in Sn-Rich Sn-Cu-Ni Alloys
Journal name Journal of Electronic Materials   Check publisher's open access policy
ISSN 0361-5235
Publication date 2010-01
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s11664-009-0962-5
Volume 39
Issue 1
Start page 56
End page 69
Total pages 14
Place of publication New York, NY, United States
Publisher Springer New York LLC
Collection year 2010
Language eng
Subject C1
091207 Metals and Alloy Materials
861603 Integrated Circuits and Devices
Formatted abstract
This paper investigates the phase equilibria and solidification behavior of Sn-Cu-Ni alloys with compositions in the range of 0 wt.% to 1.5 wt.% Cu and 0 wt.% to 0.3 wt.% Ni. The isothermal section at 268°C in the Sn-rich corner was determined. No evidence for a ternary phase was found, and the section is in good agreement with past experimental studies that report wide solubility ranges for (Cu,Ni)6Sn5 and (Ni,Cu)3Sn 4. The vacuum fluidity test was applied to compositions that are liquid at 268°C to map the variation in microstructure and flow behavior with composition in this system. Significant variations in fluidity length were measured among the Sn-Cu-Ni alloys, and the variations correlate with the microstructure that develops during solidification. The generated fluidity map enables the selection of Sn-Cu-Ni solder compositions that exhibit good fluidity behavior during solidification and form near-eutectic microstructures. © 2009 TMS.
Keyword Pb-free
phase equilibria
isothermal section
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 19 times in Scopus Article | Citations
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Created: Sun, 24 Jan 2010, 00:02:53 EST