Electrical current phase transformation of Sn-9Zn-1Ag alloy

Fei-Yi Hung, Chih Jung Wang, Truan-Sheng Lui, Li Hui Chen

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The current load not only easily induces the electromigration effect and thermal strain, but also destroys the effectiveness of solders. As of now, temperature and phase transformation problems caused by the high current load have still not been discussed. This study investigates the structural characteristics of the Sn-9Zn-1Ag alloy under an electrical current test and heat-treatment. The results indicate that the Ag existed mostly in Ag-Zn compounds, and the Zn concentration in the Ag-Zn compounds was higher than in the needle-like Zn-rich phase and Sn-Zn eutectic phase. The Sn-9Zn-1Ag alloy had no transformation during oil heat-treatment, while the structure underwent phase transformation under electrical current testing. After current testing, the needle-like Zn-rich phases had decomposed into finer particle-like features, the Ag-Zn compounds had grown and the Sn-Zn eutectic phases had increased, and the content of Sn-rich phase had decreased. Meanwhile, the current effect also caused the content of Sn to increase but Zn and O both decreased for the Zn-rich (SZO) phases in the relative composition.

Original languageEnglish
Pages (from-to)1820-1824
Number of pages5
JournalMaterials Transactions
Volume46
Issue number8
DOIs
Publication statusPublished - 2005 Aug 1

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Needles
Eutectics
phase transformations
Phase transitions
Heat treatment
Electromigration
Testing
Soldering alloys
Oils
needles
eutectics
heat treatment
Chemical analysis
electromigration
solders
high current
Temperature
oils
Hot Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Metals and Alloys

Cite this

Hung, Fei-Yi ; Wang, Chih Jung ; Lui, Truan-Sheng ; Chen, Li Hui. / Electrical current phase transformation of Sn-9Zn-1Ag alloy. In: Materials Transactions. 2005 ; Vol. 46, No. 8. pp. 1820-1824.
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Electrical current phase transformation of Sn-9Zn-1Ag alloy. / Hung, Fei-Yi; Wang, Chih Jung; Lui, Truan-Sheng; Chen, Li Hui.

In: Materials Transactions, Vol. 46, No. 8, 01.08.2005, p. 1820-1824.

Research output: Contribution to journalArticle

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