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Oxidation of Powder Processed NbAl3 Matrix Composites

Published online by Cambridge University Press:  21 February 2011

Paul S. Korinko  and
D. J. Duquette
Paul S. Korinko
Affiliation:
Rensselaer Polytechnic Institute, Materials Engineering Department, Troy, New York 12180-3590
D. J. Duquette
Affiliation:
Rensselaer Polytechnic Institute, Materials Engineering Department, Troy, New York 12180-3590
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Abstract

Niobium aluminide based composites fabricated by powder metallurgy techniques were tested for oxidation resistance between 1000 and 1400°C. The oxidation rate of these materials was improved over conventionally cast or pack aluminized NbAl3. The inclusion of oxide dispersoids decreased the rate constant by an order of magnitude at 1000°C compared to monolithic NbAl3 and to a value of the same order of magnitude as NiAl at 1170°C. The most heavily reinforced material studied had a rate constant an order of magnitude greater than NiAl at 1400°C.The oxide scale was generally adherent and compact but contained oxide nodules.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 194: Symposium R – Intermetallic Matrix Composites I , 1990 , 423
Copyright
Copyright © Materials Research Society 1990

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