Strength and Toughness of Ceramic-metal Composites Prepared by Reactive Hot Pressing

Editor(s)

Jessen, Todd and Ustundag, Ersan

Abstract

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.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Ceramic-Metal Composites; Ceramic-Intermetallic Composites; Reactive Hot Pressing; Stoichiometry; Displacement Rection

International Standard Serial Number (ISSN)

0196-6219

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 John Wiley & Sons, Inc., All rights reserved.

Publication Date

01 Mar 2008

Link to Full Text

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