Phase stability of Ag-Sn alloy nanoparticles

Kijoo Sim, Joonho Lee

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Nanoparticles often possess phase stabilities that differ from those of bulk materials, as a result of their large surface-to-volume ratio. Park and Lee suggested that the phase diagram of metallic nanoparticles can be calculated using the CALPHAD method through the introduction of the size effect. Based on Park and Lee's model, the thermodynamic parameters for the Ag-Sn nanoparticle system (pure Ag and Sn, the intermetallic compound Ag3Sn, and liquid and solid solutions (fcc, hcp, and bct)) were optimized as a function of temperature, composition, and the size of the nanoparticle. The phase stability of the Ag3Sn nanoparticles was affected by the selection of the surface tension value for Ag3Sn; however, the eutectic temperature and composition are not affected by the phase stability of the Ag3Sn nanoparticles. When the size of the nanoparticles is decreased, the eutectic temperature decreases, and the eutectic composition approaches the Sn-rich corner. The present results exhibited a reasonable agreement with the reported experimental data.

Original languageEnglish
Pages (from-to)140-146
Number of pages7
JournalJournal of Alloys and Compounds
Volume590
DOIs
Publication statusPublished - 2014 Mar 25

Keywords

  • Ag-Sn alloy
  • Eutectic temperature
  • Lead-free solder
  • Nanoparticles
  • Nanophase diagram

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Phase stability of Ag-Sn alloy nanoparticles'. Together they form a unique fingerprint.

  • Cite this