Abstract
We present dynamic measurement of drainage curves in two systems having relevance to metal matrix composite processing, namely SiC/Al and SiC/Al-12.2at%Si. Data show that liquid/solid chemical reactions that cause a lowering of the contact angle do indeed drive spontaneous ingress of metal into the preforms at fixed applied pressure; however, these also hinder infiltration under continuous infiltration, lower pressurization rates causing a reduced level of penetration by the metal at given pressure. Metal/reinforcement chemical interactions that can drive wetting by lowering the contact angle are, therefore, not necessarily beneficial in the pressure infiltration processing of particle reinforced metals.
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Acknowledgements
The authors gratefully acknowledge financial support of this research from NEDO International Joint Research Grant Program, Project 01MB7, CTI project no. 6752-2 and the internal funds from the Laboratory of Mechanical Metallurgy at EPFL.
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Molina, J.M., Bahraini, M., Weber, L. et al. Direct measurement of drainage curves in infiltration of SiC particle preforms: influence of interfacial reactivity. J Mater Sci 43, 5061–5067 (2008). https://doi.org/10.1007/s10853-008-2670-6
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DOI: https://doi.org/10.1007/s10853-008-2670-6