Microstructures and mechanical properties of spark plasma sintered Al 2O3-Co composites using electroless deposited Al 2O3-Co powders

Byong Taek Lee, Ki Ho Kim, A. H.M.Esfakur Rahman, Ho Yeon Song

Research output: Contribution to journalArticle

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Abstract

Microstructures and mechanical properties of spark plasma sintered (SPS) Al2O3-Co composites were investigated depending on the sintering temperatures (900-1200°C) and cobalt contents (0-12 mass%). The material properties of relative density and fracture toughness increased as the sintering temperature and Co content (up to 12 mass%Co) increased. In the SPSed Al2O3-Co composite sintered at 1200°C, maximum values of relative density and fracture toughness about 99.3% and 8.1 MPam 1/2, respectively were obtained. The fracture morphology of SPSed Al2O3-12 mass%Co composite showed a semi-brittle fracture mode due to the homogeneous dispersion of fine-sized Co particles.

Original languageEnglish (US)
Pages (from-to)1451-1455
Number of pages5
JournalMaterials Transactions
Volume49
Issue number6
DOIs
Publication statusPublished - Jun 1 2008

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All Science Journal Classification (ASJC) codes

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

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