Compressive characteristics of A356/fly ash cenosphere composites synthesized by pressure infiltration technique

P. K. Rohatgi, J. K. Kim, N. Gupta, Simon Alaraj, A. Daoud

Research output: Contribution to journalArticle

Abstract

Loose beds of hollow fly ash particles (cenospheres) were pressure infiltrated with A356 alloy melt to fabricate metal-matrix syntactic foam, using applied pressure up to 275 kPa. The volume fractions of cenospheres in the composites were in the range of 20-65%. The processing variables included melt temperature, gas pressure and particles size of fly ash. The effect of these processing variables on the microstructure and compressive properties of the synthesized composites is characterized. Compressive tests performed on these metal-matrix composites containing different volume fractions of hollow fly ash particles showed that their yield stress, Young's modulus, and plateau stress increase with an increase in the density. Variations in the compressive properties of the composites in the present study were compared with other foam materials.

Original languageEnglish (US)
Pages (from-to)430-437
Number of pages8
JournalComposites Part A: Applied Science and Manufacturing
Volume37
Issue number3
DOIs
StatePublished - Mar 2006

Keywords

  • A. Foams
  • A. Metal-matrix composites
  • A. Particle reinforcement
  • D. Mechanical testing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

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