Microstructure and elemental composition of electrochemically formed dendrites on lead-free micro-alloyed low Ag solder alloys used in electronics

Bálint Medgyes, Barbara Horváth, Balázs Illés, Tadashi Shinohara, Akira Tahara, Gábor Harsányi, Olivér Krammer

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The Electrochemical Migration (ECM) behaviour of lead-free, micro-alloyed, low Ag solder alloys was investigated using Scanning Transmission Electron Microscopy (STEM), Energy Disperse X-ray Spectroscopy (EDS) and electron diffraction methods. Different solder alloys were investigated by Water Drop (WD) tests to stimulate ECM failure mechanism. After WD tests, differently structured dendrites were formed depending on the solder alloy types. The results showed that micro-alloying components (e.g. Sb) also played role during the ECM processes. The novelty of this study is the demonstration that Sb can take part in the ECM process; the ECM model of Sb is also discussed.

Original languageEnglish
Pages (from-to)43-47
Number of pages5
JournalCorrosion Science
Volume92
DOIs
Publication statusPublished - Mar 1 2015

Keywords

  • A. Alloy
  • B. STEM
  • C. Anodic dissolution
  • C. Pourbaix diagram

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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