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Nickel-Alumina Composites: In Situ Synthesis by a Displacement Reaction, and Mechanical Properties

Published online by Cambridge University Press:  15 February 2011

Steven A. Jones ,
James M. Burlitch ,
Ersan Üstündag ,
Jeannie Yoo  and
Alan T. Zehnder
Steven A. Jones
Affiliation:
Dept. of Chemistry, Cornell University, Ithaca, NY 14853
James M. Burlitch
Affiliation:
Dept. of Chemistry, Cornell University, Ithaca, NY 14853
Ersan Üstündag
Affiliation:
Dept. of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
Jeannie Yoo
Affiliation:
Dept. of Materials Science and Engineering, Cornell University, Ithaca, NY 14853
Alan T. Zehnder
Affiliation:
Dept. of Theoretical and Applied Mechanics, Cornell University, Ithaca, NY 14853
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Abstract

Nickel-alumina composites have the potential to be high performance materials. Alumina, with its excellent oxidation resistance, combined with a ductile phase such as nickel may provide a tough material with a lower density and higher Young's modulus, overall, a higher specific modulus than typical Superalloys. Dense, interpenetrating Ni-Al2O3 composites were synthesized using a displacement reaction between NiO and aluminum. The resulting composites were characterized in terms of their mechanical properties such as hardness, flexure strength, fracture toughness and elastic constants. The synthesis, characterization, and mechanical properties, as well as the effect of the interpenetrating microstructure on the toughening mechanisms and other properties will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 365: Symposium M – Ceramic Matrix Composites–Advanced High-Temperature Structural Materials , 1994 , 53
Copyright
Copyright © Materials Research Society 1995

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