Fabrication of Cu/Al2O3/Cu Symmetrical Functionally Graded Material by Spark Plasma Sintering Process

Aiko Ohtsuka, Akira Kawasaki, Ryuzo Watanabe, Um Tae Young

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Disk-shaped functionally graded materials of copper/alumina system have been fabricated by spark plasma sintering(SPS process. The graded layer consists of symmetrical compositional transition of Cu/Al2O3/Cu, which allows to achieve high heat conduction, electrical insulation and excellent in-plane electrical conductivity. The use of the FGMs as a compliant pad of conduction type of thermoelectric power conversion system offers high thermal energy density through the thermoelectric cell, resulting in the increase of the efficiency of thermoelectric energy conversion. This paper describes the process optimization including densification of metal-ceramic powder mixtures by SPS process, compositionally graded stacking of the mixed powders in a graphite die, the design of the compositional gradient on the basis of one dimensional heat conduction analysis and fabrication of Cu/Al2O3/Cu FGMs according to the predesigned compositional gradient.

Original languageEnglish
Pages (from-to)220-224
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume45
Issue number3
DOIs
Publication statusPublished - 1998 Jan 1

Keywords

  • FGM compliant pad
  • Spark plasma sintering (SPS)
  • Thermoelectric (TE) power conversion system

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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