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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.49  No.6 (2008)  >  pp.1451-1455

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Microstructures and Mechanical Properties of Spark Plasma Sintered Al2O3-Co Composites Using Electroless Deposited Al2O3-Co Powders

Byong-Taek Lee1), Ki-Ho Kim1), A. H. M. Esfakur Rahman1) and Ho-Yeon Song1)
1) Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University

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.

Al2O3-Co composite, electroless deposition, nano coating, spark plasma sintering

Received: January 10, 2008
Accepted: March 14, 2008 , Published online: May 25, 2008
Copyright (c) 2008 The Japan Institute of Metals



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