The Weibull statistical analysis for evaluating microstructural effects on electrification-fusion phenomenon of Sn-xZn alloys

Gong An Lan, Chung Wei Yang, Truan Sheng Lui, Li Hui Chen

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Microstructural features of Sn-xZn alloys with varying zinc content of 7, 9, and 14 wt.% on the electrification-fusion phenomenon was investigated in this study. Experimental results showed that the electrical conductivity of Sn-xZn alloys increases with increasing zinc content. The increase of zinc-rich phase is the main factor in the increase of the electrical conductivity. The melting latent heat of Sn/Zn eutectic phase tended to decrease with increasing zinc content, the evidence was consistent with the increase of critical fusion current density of Sn-xZn alloys. Based on the data fluctuation of fusion current densities, the Weibull model provided a powerful statistical analysis for assessing the minimum critical fusion current density, the fusion-failure mechanism and the reliability for the solders. The statistical Weibull model analysis results indicated that the Weibull modulus of Sn-xZn alloys decreases with increasing zinc content. The hypereutectic Sn-14Zn alloy, which shows microstructural inhomogeneity and a large data fluctuation of critical fusion current density, was unreliable for further electronic devices and PCB applications. Crown

Original languageEnglish
Pages (from-to)294-299
Number of pages6
JournalJournal of Alloys and Compounds
Volume475
Issue number1-2
DOIs
Publication statusPublished - 2009 May 5

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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