Fracture Behaviour of Pressureless Sintered Nickel-Reinforced Alumina Composites

Abstract:

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Nickel-reinforced alumina composites have been manufactured by aqueous slip casting and pressureless sintered under flowing atmosphere of argon with 0,36 and 1% of oxygen in order to force interfacial reactions leading to the formation of a nickel-aluminum spinel. Colloidal stability of concentrated suspensions of alumina with 5, 10 and 15 vol% of nickel has been studied in terms of zeta potential, rheometry and packing density. The processed composites show a high dispersion of the nickel into the alumina matrix and green densities of 60-70 %th. The effect of sintering temperature and atmosphere on the mechanical behaviour of the composites has been investigated through Vickers indentation and fractographic SEM observations.

Info:

Periodical:

Edited by:

J. Dusza, R. Danzer and R. Morrell

Pages:

324-327

DOI:

10.4028/www.scientific.net/KEM.290.324

Citation:

A. Beverina et al., "Fracture Behaviour of Pressureless Sintered Nickel-Reinforced Alumina Composites", Key Engineering Materials, Vol. 290, pp. 324-327, 2005

Online since:

July 2005

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Price:

$38.00

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