Affiliation:
1. Seoul National University of Technology
2. Hanyang University
3. Korea Institute of Ceramic Engineering and Technology, KICET
4. Osaka University
Abstract
The microstructure and mechanical properties including wear resistance of Al2O3-based
nanocomposites with 5 vol% of Cu and Ni-Co dispersions were investigated. Al2O3/Cu and Al2O3/
Ni-Co nanocomposites were fabricated by hydrogen reduction and sintering process using metal
oxide and metal nitrates. The composites showed homogeneous microstructures with nano-sized
metal dispersions and enhanced fracture strength and toughness compared with monolithic Al2O3. In
particular, high toughness and hardness were measured for the Al2O3/Ni-Co nanocomposite
consolidated by PECS. A minimum wear coefficient of 2.33 x 10-5 mm3/Nm was obtained for the
Al2O3/Ni-Co nanocomposite, while the monolithic Al2O3 showed a value of 2.0 x 10-5 mm3/Nm.
Wear behavior is discussed in terms of microstructure and mechanical properties of the
nanocomposites.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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