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The mechanism of spontaneous infiltration of Al–Si alloy into SiC preform in air

Published online by Cambridge University Press:  31 January 2011

X. M. Xi ,
L. M. Xiao  and
X. F. Yang
X. M. Xi
Affiliation:
Materials Research and Education Center, 201 Ross Hall, Auburn University, Auburn, Alabama 36849–5351
L. M. Xiao
Affiliation:
Materials Research and Education Center, 201 Ross Hall, Auburn University, Auburn, Alabama 36849–5351
X. F. Yang*
Affiliation:
Materials Research and Education Center, 201 Ross Hall, Auburn University, Auburn, Alabama 36849–5351
*
a) Author to whom correspondence should be addressed.
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Abstract

Rapid, spontaneous infiltration can be achieved by dipping a SiC preform that contains pyrolyzed carbon into an Al–Si alloy bath in an open air environment. The mechanism for infiltration is investigated in the present work by studying the effects of several relevant parameters on the infiltration process. Experimental results have shown that the requirements for rapid spontaneous infiltration are an infiltration temperature higher than 1400 °C, the presence of a pyrolyzed carbon, and the presence of SiC particle in the preforms. The concentration of Si in the alloy does not have significant influence on the infiltration rate, but it strongly affects the resulting microstructures in the infiltrated composites.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 4 , April 1996 , pp. 1037 - 1044
Copyright
Copyright © Materials Research Society 1996

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