Determination of the minimum Ni concentration to prevent the η to η4+1 polymorphic transformation of stoichiometric Cu6Sn5

Wu, Y. Q., McDonald, S. D., Read, J., Huang, H. and Nogita, K. (2013) Determination of the minimum Ni concentration to prevent the η to η4+1 polymorphic transformation of stoichiometric Cu6Sn5. Scripta Materialia, 68 8: 595-598. doi:10.1016/j.scriptamat.2012.12.012


Author Wu, Y. Q.
McDonald, S. D.
Read, J.
Huang, H.
Nogita, K.
Title Determination of the minimum Ni concentration to prevent the η to η4+1 polymorphic transformation of stoichiometric Cu6Sn5
Formatted title
Determination of the minimum Ni concentration to prevent the η to η4+1 polymorphic transformation of stoichiometric Cu6Sn5
Journal name Scripta Materialia   Check publisher's open access policy
ISSN 1359-6462
1872-8456
Publication date 2013-04
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.scriptamat.2012.12.012
Volume 68
Issue 8
Start page 595
End page 598
Total pages 4
Place of publication Oxford, United Kingdom
Publisher Pergamon
Collection year 2013
Language eng
Formatted abstract
The minimum Ni concentration required to prevent the η to η4+1 polymorphic transformation of stoichiometric Cu6Sn5 was found to be as low as 1 at.%. This is crucial in lead-free solder joints, especially in the ball grid array packages, in which only limited Ni can be supplied by micrometer-size solder balls. The Ni stabilization effect is present over a large temperature range with no phase transformation occurring between −120 and 250 °C for the timeframes used in this study.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 21 December 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2013 Collection
 
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Created: Sat, 02 Mar 2013, 13:25:41 EST by Professor Han Huang on behalf of School of Mechanical and Mining Engineering