Particle size versus grain size relation in the sprayformed Al-18Si composites

Hyun Kwang Seok, Kyoung Won Park, Jae Chul Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Various hypereutectic Al-18Si-X composites with different average Si particle sizes ranging from 0.2̃30 μm were produced by varying process parameters of spray forming. The effect of the Si particle size in determining the matrix grain size was investigated in order to design the optimum process for producing hypereutectic Al-18Si-X composites with fine microstructures. The experimental results suggested that the Si particle size greater than 2 μm is desirable for retarding the grain coarsening during subsequent forming processes, resulting in the fine microstructure. The observed results on the coarsening behavior of grains during spray-forming were analyzed from the free energy viewpoint.

Original languageEnglish
Pages (from-to)609-613
Number of pages5
JournalMetals and Materials International
Volume15
Issue number4
DOIs
Publication statusPublished - 2009 Aug

Keywords

  • Hypereutectic Al-Si-X composites
  • Microstructure evolution
  • Spray forming

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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