In situ observation of twin boundary formation at grain-boundary groove during directional solidification of Si

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Abstract

Twin boundary formation at grain boundaries in multicrystalline Si during directional solidification was investigated by in situ observation of the crystal/melt interface. It was clearly shown that a twin boundary was formed on the {111} facet of grain-boundary groove at the crystal/melt interface. The large amount of undercooling in the melt at grain-boundary grooves promoted rapid crystallization and twin boundary formation.

Original languageEnglish
Pages (from-to)65-69
Number of pages5
JournalScripta Materialia
Volume133
DOIs
Publication statusPublished - 2017 May 1

Keywords

  • Crystal/melt interface
  • Grain boundary
  • Twin boundary

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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