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Extrusion Rheology and Structure of Alumina - Silicon Carbiide Composites

Published online by Cambridge University Press:  15 February 2011

S Blackburn
S Blackburn*
Affiliation:
Interdisciplinary Research Centre in Materials for High Performance Applications and School of Chemical Engineering, The University of Birmingham, Edgbaston, Birmingham B 15 2TT, United Kingdom.
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Abstract

Silicon carbide fibre reinforced alumina compacts were formed by extrusion. The powder and fibre were pre-mixed and milled before high shear kneading to produce a homogeneous dispersion of up to 30 vol% chopped SiC fibre with high green density. The rheology of the paste was characterised using a physically based model. It is demonstrated that the pressure drop and constituent paste parameters are all systematically reduced with increasing fibre loadings for a given moisture content. It is suggested that particle packing theory in combination with fibre interactions within the paste and die system offers an explanation for the observed results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 289: Symposium M – Flow and Microstructure of Dense Suspensions , 1992 , 135
Copyright
Copyright © Materials Research Society 1993

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