Strength and Toughness of Ceramic-metal Composites Prepared by Reactive Hot Pressing
Jessen, Todd and Ustundag, Ersan
Metal-reinforced A1203-matrix composites were prepared using reactive hot pressing. The volume fraction of the reinforcing phase was controlled by the stoichiometry of the particular displacement reaction used. Dense Al2O3-Ni and Al2O3-Nb composites were fabricated using this technique. The best combination of strength, 610 MPa, and toughness, 12 MPam1/2, was found for the Al2O3-Ni composites. Indentation cracks and fracture surfaces showed evidence of ductile deformation of the Ni phase. The Al2O3-Nb composites had high strength, but the toughness was lower than expected due to the poor bonding between the Nb and Al2O3 phases.
D. T. Ellerby et al., "Strength and Toughness of Ceramic-metal Composites Prepared by Reactive Hot Pressing," Ceramic Engineering and Science Proceedings, John Wiley & Sons, Inc., Mar 2008.
The definitive version is available at http://dx.doi.org/10.1002/9780470294628.ch78
Materials Science and Engineering
Keywords and Phrases
Ceramic-Metal Composites; Ceramic-Intermetallic Composites; Reactive Hot Pressing; Stoichiometry; Displacement Rection
Article - Journal
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