MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Microstructures and Mechanical Properties of Spark Plasma Sintered Al2O3-Co Composites Using Electroless Deposited Al2O3-Co Powders
Byong-Taek LeeKi-Ho KimA. H. M. Esfakur RahmanHo-Yeon Song
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2008 Volume 49 Issue 6 Pages 1451-1455

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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.

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© 2008 The Japan Institute of Metals and Materials
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