Effects of Ni additions, trace elements and solidification kinetics on microstructure formation in Sn-0.7Cu solder

Ventura, Tina, Terzi, Sofiane, Rappaz, Michel and Dahle, Arne K. (2011) Effects of Ni additions, trace elements and solidification kinetics on microstructure formation in Sn-0.7Cu solder. Acta Materialia, 59 10: 4197-4206. doi:10.1016/j.actamat.2011.03.044


Author Ventura, Tina
Terzi, Sofiane
Rappaz, Michel
Dahle, Arne K.
Title Effects of Ni additions, trace elements and solidification kinetics on microstructure formation in Sn-0.7Cu solder
Journal name Acta Materialia   Check publisher's open access policy
ISSN 1359-6454
1873-2453
Publication date 2011-01-01
Sub-type Article (original research)
DOI 10.1016/j.actamat.2011.03.044
Open Access Status Not Open Access
Volume 59
Issue 10
Start page 4197
End page 4206
Total pages 10
Place of publication Oxford, United Kingdom
Publisher Pergamon
Subject 2503 Ceramics and Composites
2506 Metals and Alloys
2507 Polymers and Plastics
2504 Electronic, Optical and Magnetic Materials
Abstract Five ternary Sn-0.7Cu-xNi alloys with nickel contents in the range 0-1000 ppm have been directionally solidified at different growth rates. The competition between primary tetragonal Sn cells/dendrites, eutectic and primary Cu 6Sn 5 is interpreted with phase diagrams available in the literature and in terms of the coupled zone concept. As for binary Sn-Cu alloys, it is found that Sn-Cu-Ni forms two different eutectic morphologies (coarse and fine) simultaneously during eutectic growth. Solidification of high-purity alloys with the intentional addition of selected trace elements usually present in tin confirms the importance of impurities in the destabilization of the eutectic interface into cellular morphologies, with the fine and coarse eutectic present at the cell centres and boundaries, respectively.
Keyword Bridgman technique
Directional solidification
Eutectic solidification
Soldering
Solidification
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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