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Al2O3 Composites Containing Fe, Nb and Zr Aluminides

Published online by Cambridge University Press:  15 February 2011

D. E. García ,
S. Schicker ,
J. Bruhn ,
A. Krupp ,
R. Janssen  and
N. Claussen
D. E. García
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
S. Schicker
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
J. Bruhn
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
A. Krupp
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
R. Janssen
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
N. Claussen
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
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Abstract

A reactive powder-processing technique involving controlled exothermic solid-state reactions between Al and oxides has been used to produce nearly fully dense composites with interpenetrating networks of aluminides and Al2O3. The process consists of the in situ formation of aluminides and Al2O3 from compacts of intensively milled oxide-Al powder mixtures followed by pressureless sintering. The reactions take place usually at temperatures below the melting point of Al. At temperatures >1000°C, the reaction products start to sinter yielding microstructures with very fine and uniform phase distribution. The present paper discuses processing parameters such as attrition milling, heating cycle and atmosphere controlling microstructural development and mechanical properties of Al2O3 composites containing Fe, Nb and Zr aluminides.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 761
Copyright
Copyright © Materials Research Society 1997

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References

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