*2.2.3 Infiltration process*

The molten metal alloy is unfiltered into the porous form of reinforcement under the pressurized gas to apply the pressure. The pressure causes the penetration and dispersion of molten metal into reinforcement, which have a volume fraction of 10–70% depending upon porosity level. Some binding agents are required to maintain the integrity and shape of porous form. The infiltration processes are classified into the following three categories


The gas is applied in the gas infiltration process to penetrate the molten metal into porous reinforcement. The reinforcements of porosity 5–10% are sprayed on the surface of metal alloy in the spray deposition process. The sprayed particles are consolidated by further processing. The particle/fibers spacing impacts the volume fraction and distribution.
