Chemical vapor infiltration
Encyclopedia
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 Composite
s (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
.
Chemical vapor deposition
Chemical vapor deposition is a chemical process used to produce high-purity, high-performance solid materials. The process is often used in the semiconductor industry to produce thin films. In a typical CVD process, the wafer is exposed to one or more volatile precursors, which react and/or...
(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 Composite
Ceramic Matrix Composite
Ceramic matrix composites are a subgroup of composite materials as well as a subgroup of technical ceramics. They consist of ceramic fibers embedded in a ceramic matrix, thus forming a ceramic fiber reinforced ceramic material...
s (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
Silicon carbide
Silicon carbide , also known as carborundum, is a compound of silicon and carbon with chemical formula SiC. It occurs in nature as the extremely rare mineral moissanite. Silicon carbide powder has been mass-produced since 1893 for use as an abrasive...
). The CVI-process was designed and first experimented by Professor Roger Naslain
Roger Naslain
Prof. Roger R. Naslain is French chemical and physical scientist. He has been a Professor at the University of Bordeaux 1 since 1969....
from the University of Bordeaux 1 on carbon fiber
Carbon fiber
Carbon fiber, alternatively graphite fiber, carbon graphite or CF, is a material consisting of fibers about 5–10 μm in diameter and composed mostly of carbon atoms. The carbon atoms are bonded together in crystals that are more or less aligned parallel to the long axis of the fiber...
reinforced SiC
Silicon carbide
Silicon carbide , also known as carborundum, is a compound of silicon and carbon with chemical formula SiC. It occurs in nature as the extremely rare mineral moissanite. Silicon carbide powder has been mass-produced since 1893 for use as an abrasive...
composites for aerospace applications
Aerospace engineering
Aerospace engineering is the primary branch of engineering concerned with the design, construction and science of aircraft and spacecraft. It is divided into two major and overlapping branches: aeronautical engineering and astronautical engineering...
.