Electrical characterization of β → α-Sn transition in high tin content solder alloys with different inoculators

B. Illés, A. Skwarek, R. Bátorfi, T. Hurtony, G. Harsányi

Research output: Contribution to journalArticle

Abstract

The identification of allotropic transition of the metallic β-Sn to non-metallic α-Sn in Sn-rich solders joints is crucial for electronics working in sub-zero temperatures. This phenomenon was characterized by electrical resistance measurements in SnCu1 and Sn99Ag0.3Cu0.7 alloys inoculated with InSb, CdTe and α-Sn. Samples were stored at −18 C for 10 weeks. The transition showed characteristic differences at the different alloys and inoculators, like different nucleation, growth and the saturation stages. Although the presence of α-Sn initiates the transition faster than the other inoculators, but the higher diffusion rate of the non-tin inoculators results in much more serious destruction of the samples. The results of the electrical resistance measurements were validated with metallurgical cross-sections.

Original languageEnglish
Pages (from-to)935-937
Number of pages3
JournalActa Physica Polonica A
Volume135
Issue number5
DOIs
Publication statusPublished - Jan 1 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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