Abstract
The infiltration characteristics of liquid AZ91D alloy into carbon fiber preform were investigated through a measuring device. The infiltration processes were monitored continuously using the thermocouples and electrical proportional valve. Experimental data were analyzed to establish the infiltration kinetics model and threshold pressure model, in which the uncertainties in the model about the fractal characters of porous media have been determined. The theoretical models and experiment data are compared and well matched. Results for the infiltration kinetics and threshold pressure were discussed also. The threshold pressure was found to be proportional to the volume fraction of fibers in the preform. And the control methods to improve the quality of the infiltration were also discussed.
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