Iron metal matrix composites in aluminium oxide offers an outstanding possibility to reduce abrasive wear where usual alloys are not working well. For the present study the composite was obtained by carrying out an spontaneous infiltration of an eutectic (3,9 degrees Celsius) nodular iron in a preform made with three aluminiun oxide granulometries (#12, #16 and #42), in three different pouring temperatures (1403 degrees Celsius, 1299 degrees Celsius e 1250 degrees Celsius). The preforms compression tests results were processed by factorial analysis and showed a greater influence of the sodium silicate amount and the curing time over the aluminium oxide granulometry. After the estimation of the ceramic phase permeability by 3D image digital processing it was developed a mathematical model to predict the maximum infiltration of the ferrous melt through the ceramic phase. It was based on the pouring and alloy solidification temperatures and produced a good agreement with the experimental results. The matrix microstructure was affected by the ceramic grains. This was characterized by the presence of lamellar graphite instead of the expected nodules in an extension between 10 micrometers and 60 micrometers from the border of the composite.