Ceramic Matrix Composites Examples

Silicon carbide ceramic alumina and alumina silica matrix carbon carbon composite 10.

Ceramic matrix composites examples.

Naslain mr pomeroy in reference module in materials science and materials engineering 2016. Ceramic matrix composites are designed to have advantages over plain old ceramics such as fracture resistance thermal shock resistance and improved dynamical load capacity. Ceramic matrix composites cmcs are a subgroup of composite materials as well as a subgroup of ceramics they consist of ceramic fibers embedded in a ceramic matrix. Both the matrix and the fibers can consist of any ceramic material whereby carbon and carbon fibers can also be considered a ceramic material.

Metal matrix and ceramic matrix composites. Metal matrices offer not only high temperature resistance but also strength and ductility or bendability which increases toughness. Examples of these composites are silicon carbide whisker reinforced alumina zirconia toughened alumina titanium carbide reinforced alumina and alumina bonded silicon carbide to name but a few. Ceramic matrix composites cmcs are a special type of composite material in which both the reinforcement refractory fibers and matrix material are ceramics.

Turbines furnaces brake disks and machine parts such as slide bearings. Silicon carbide matrix composites are fabricated by chemical vapor infiltration or liquid phase infiltration methods of a matrix material into a preform prepared from silicon carbide fibers. Cmcs are designed to overcome the main drawback of monolithic ceramics namely their brittleness. Often designed to improve the crack resistance of very hard ceramics such as silicon carbide that are prone to cracking like glass.

Metal matrix composite a reinforcing material such as metal or a ceramic dispersed in a metal matrix. The requirement that finished parts be able to operate at temperatures high enough to melt or degrade a polymer matrix creates the need for other types of matrix materials often metals. Ceramic matrix composites reinforced with continuous fibres are commonly fabricated by infiltration methods in which a ceramic matrix is formed by a fluid infiltrating the fibrous structure. In some cases the same kind of ceramic is used for both parts of the structure and additional secondary fibers may also be included.

Examples of these high performance ceramics include oxides nitrides and carbides of silicon aluminum titanium and zirconium. Matrix material for long fiber continuous fiber composite may be. Ceramic matrix composites cmcs generally consist of ceramic fibers or whiskers in a ceramic matrix. Ceramic matrix composites may also be designed for high tensile strength flextual strength and extreme durability.

The conversion of fluid into ceramics varies according to the type of fluid used and the processes involved.