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 journalArticlepeer-review

42 Scopus citations

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

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

Fingerprint Dive into the research topics of 'Interfacial microstructure of graphite flake reinforced aluminum matrix composites fabricated via hot pressing'. Together they form a unique fingerprint.

Cite this