Chemical vapor infiltration (CVI) is a variant on Chemical Vapor Deposition (CVD). CVD implies deposition onto a surface, whereas CVI implies deposition within a body. Chemical vapor infiltration is widely used as a means of fabricating Ceramic Matrix Composites (CMCs) such as alumina/alumina (alumina fiber reinforced alumina), in which a chemical vapor consisting of AlCl3-H2-CO2 is deposited onto porous alumina fibers or preforms, or SiC/SiC (silicon carbide fiber reinforced silicon carbide). The CVI-process was designed and first experimented by Professor Roger Naslain from the University of Bordeaux 1 on carbon fiber reinforced SiC composites for aerospace applications.
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