Interfacial microstructure of graphite flake reinforced aluminum matrix composites fabricated via hot pressing

Hiroki Kurita, Takamichi Miyazaki, Akira Kawasaki, Yongfeng Lu, Jean François Silvain

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The microstructure of graphite flake (GF) reinforced aluminum (Al) matrix (Al-GF) composites was observed in detail. Due to thermal mismatch between Al and GF, an inner structure of GF was damaged in proximity to the Al/GF interface, while the unique bridging of the sticky graphite sheets barely connected the Al matrix and GF. This result suggests that the GF interlaminar strength is weaker than the Al/GF interfacial strength; the GF interlaminar strength is thus the dominant determinant of the thermomechanical and mechanical properties of the Al-GF composite. Whereas the thermal conductivity of the Al-GF composite was consistent with that theoretically predicted, the outstanding thermal expansion coefficient (TEC) of the graphite was not reflected in the produced Al-GF composites. The damaged inner structure of GF in proximity to the Al/GF interface contributes to heat transfer but does not bear the load resulting from thermal stress.

Original languageEnglish (US)
Pages (from-to)125-131
Number of pages7
JournalComposites Part A: Applied Science and Manufacturing
Volume73
DOIs
StatePublished - Jun 1 2015

Fingerprint

Graphite
Hot pressing
Aluminum
Microstructure
Aluminum graphite composites
Composite materials
Thermal stress
Thermal expansion
Loads (forces)
Thermal conductivity

Keywords

  • A. Metal-matrix composites (MMCs)
  • B. Interface/interphase
  • B. Thermal properties
  • E. Powder processing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

Cite this

Interfacial microstructure of graphite flake reinforced aluminum matrix composites fabricated via hot pressing. / Kurita, Hiroki; Miyazaki, Takamichi; Kawasaki, Akira; Lu, Yongfeng; Silvain, Jean François.

In: Composites Part A: Applied Science and Manufacturing, Vol. 73, 01.06.2015, p. 125-131.

Research output: Contribution to journalArticle

Kurita, Hiroki ; Miyazaki, Takamichi ; Kawasaki, Akira ; Lu, Yongfeng ; Silvain, Jean François. / Interfacial microstructure of graphite flake reinforced aluminum matrix composites fabricated via hot pressing. In: Composites Part A: Applied Science and Manufacturing. 2015 ; Vol. 73. pp. 125-131.
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