Mechanical and thermal properties of nanocarbon-reinforced aluminum matrix composites at elevated temperatures

S. E. Shin, Y. J. Ko, D. H. Bae

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

This study evaluated the mechanical and thermal properties of aluminum alloy 2024 (Al2024) matrix composites reinforced with multi-walled carbon nanotube (MWCNT) or few-layered graphene (FLG) in the temperature range of 250–430 °C. The Al2024/MWCNT and Al2024/FLG composites were fabricated using powder metallurgy, and the associated microstructures were observed. At 350 °C, both composites maintain high yield stress about 110 MPa, since uniform dispersion of the nano-scale reinforcements has a strong interface, hinders the dislocation movement and eutectic phase coarsening and severe softening of the matrix. The composites also show a low thermal expansion coefficient of ∼18×10−6/K. The results are respectively over ∼2.5 times higher strength and ∼20% lower CTE than those of commercial Al alloy used as piston material (AlSi12CuMgNi).

Original languageEnglish
Pages (from-to)66-73
Number of pages8
JournalComposites Part B: Engineering
Volume106
DOIs
Publication statusPublished - 2016 Dec 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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