Fabrication and thermoelectric properties of Al/Mg2Si composite materials

Yuta Hayashibara, Kei Hayashi, Ikumi Ando, Masataka Kubouchi, Yohei Ogawa, Wataru Saito, Yuzuru Miyazaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Mg2Si has attracted interest as a potential thermoelectric material that can convert waste heat into electricity. To improve thermoelectric performance of Mg2Si, Al/Mg2Si composite materials with nominal composition of xAl/Mg2Si (x = 0.25, 0.5, 0.75, 1.0, or 1.5) were fabricated, i.e., an Al metal phase was introduced to an Mg2Si matrix. Reflecting an increase in the electrical conductivity and a decrease in the Seebeck coefficient with increasing x, the power factor was successfully enhanced by the incorporation of the Al phase. The increase in electrical conductivity was discussed in terms of electron carrier density and carrier mobility.

Original languageEnglish
Pages (from-to)1041-1045
Number of pages5
JournalMaterials Transactions
Volume59
Issue number7
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Aluminum
  • Carrier mobility
  • Composite material
  • Electron carrier density
  • Magnesium silicide
  • Microstructure
  • Thermoelectric properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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