Morphology of silicon grain boundaries in Sr-modified Al-Si eutectic alloys by HREM

M. Shamsuzzoha, P. A. Deymier, David Smith

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Abstract

Crystallographic changes in the Σ3〈110〉/{111}, Σ3〈110〉/{112} and Σ9〈110〉/{112} boundaries induced by th presence of strontium in the silicon phase of Sr-modified Al-Si alloys have been studied by high-resolution electron microscopy. The Σ3 boundaries possessing {111} and {112} planes in the pure silicon phase often exhibit asymmetric morphologies in the Sr-modified phase. Interaction of various Σ3〈110〉/{111} boundaries results in both Σ3〈110〉/{112} and Σ9〈110〉/{112} boundaries. The resulting Σ9 boundaries also show asymmetrical inclination.

Original languageEnglish (US)
Pages (from-to)265-270
Number of pages6
JournalUltramicroscopy
Volume40
Issue number3
DOIs
StatePublished - Mar 1992

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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