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The relation between infiltration displacement in a preform and time were measured in infiltration experiments using a simply shaped Fe-Cr-Si preform with a small size and A336.0 molten alloy under the conditions of the temperature range of 973-1073 K and low pressure of 0.4 MPa. The permeability coefficient was estimated from this relation and its value showed the temperature dependence. In contrast, pressure distribution of the molten alloy in a complex preform with a large size was calculated on the basis of Darcy's law using the permeability coefficient estimated in this study. The infiltration behavior which could be estimated from the calculated pressure distribution of the molten alloy, agreed with that obtained from the practical infiltration. The period showing an end of the infiltration in the preform was same in both results of simulation and experiment. It is found that the pressure distribution of the molten alloys in preforms can be estimated by this calculation method using the permeability coefficient obtained from the infiltration displacement and time, regardless of a kind, size or porosity of preforms and a kind or temperature of molten metals.

Measurement in Permeability Coefficient of Molten Aluminum Alloy in a Preform and Simulation of Infiltration under Low Pressure