Microstructures and Mechanical Properties of Spark Plasma Sintered Al<SUB>2</SUB>O<SUB>3</SUB>-Co Composites Using Electroless Deposited Al<SUB>2</SUB>O<SUB>3</SUB>-Co Powders

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  • Lee Byong-Taek
    Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University
  • Kim Ki-Ho
    Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University
  • Rahman A. H. M. Esfakur
    Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University
  • Song Ho-Yeon
    Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University

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  • Microstructures and mechanical properties of spark plasma sintered Al2O3-Co composites using electroless deposited Al2O3-Co powders

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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 MPam1⁄2, 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.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 49 (6), 1451-1455, 2008

    The Japan Institute of Metals and Materials

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