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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: [email protected]
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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

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