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Reaction sintering of alumina-aluminide alloys (3A)

Published online by Cambridge University Press:  31 January 2011

N. Claussen ,
D. E. Garcia  and
R. Janssen
N. Claussen
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
D. E. Garcia
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
R. Janssen
Affiliation:
Advanced Ceramics Group, Technische Universität Hamburg-Harburg, 21071 Hamburg, Germany
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Abstract

A novel pressureless reaction sintering process is presented for the fabrication of Al2O3-aluminide alloys (3A). Compacts of intensively milled metal oxide-aluminum mixtures are heat-treated in vacuum or inert atmosphere such that the exothermic reactions take place in a controlled manner essentially at temperatures below the melting point of Al. Dense, homogeneous microstructures were obtained with a variety of Al2O3-matrix systems with interpenetrating networks of aluminides of Ti, Fe, Nb, Mo, Zr, Ni, etc. By adding modifiers in the form of oxides or metals, volume and phase composition as well as properties can be tailored in a wide range.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 11 , November 1996 , pp. 2884 - 2888
Copyright
Copyright © Materials Research Society 1996

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References

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