Ceramic matrix composite

About: Ceramic matrix composite is a research topic. Over the lifetime, 7807 publications have been published within this topic receiving 117020 citations.

Process for the preparation of fiber-reinforced ceramic composites by chemical vapor deposition

Abstract: A chemical vapor deposition (CVD) process for preparing fiber-reinforced ceramic composites. A specially designed apparatus provides a steep thermal gradient across the thickness of a fibrous preform. A flow of gaseous ceramic matrix material is directed into the fibrous preform at the cold surface. The deposition of the matrix occurs progressively from the hot surface of the fibrous preform toward the cold surface. Such deposition prevents the surface of the fibrous preform from becoming plugged. As a result thereof, the flow of reactant matrix gases into the uninfiltrated (undeposited) portion of the fibrous preform occurs throughout the deposition process. The progressive and continuous deposition of ceramic matrix within the fibrous preform provides for a significant reduction in process time over known chemical vapor deposition processes.

Ceramic matrix composite vane with chordwise stiffener

Abstract: A means (22) for structurally stiffening or reinforcing a ceramic matrix composite (CMC) gas turbine component, such as an airfoil-shaped component, is provided. This structural stiffening or reinforcing of the airfoil allows for reducing bending stress that may be produced from internal or external pressurization of the airfoil without incurring any substantial thermal stress. The stiffener is disposed on a CMC wall and generally extends along a chord length of the airfoil.

Internal combustion engine and composite parts formed from silicon carbide fiber-reinforced ceramic or glass matrices

Abstract: A high strength, fracture tough, high temperature oxidatively stable, heat insulating internal combustion engine combustion chamber component is described made of a silicon carbide fiber reinforced ceramic matrix or a silicon carbide fiber reinforced glass matrix material. An internal combustion engine containing combustion chamber components as above described is also disclosed.

Modeling the Tensile Behavior of Unidirectional C/SiC Ceramic-Matrix Composites

Abstract: The uniaxial tensile behavior of unidirectional C/SiC ceramic-matrix composites at room temperature has been investigated. An approach to predicting the uniaxial tensile stress–strain curve of the unidirectional ceramicmatrix composites is developed. The Budiansky–Hutchinson–Evans shear lag model is used to describe the microstress field of damaged composites. A statistical matrix cracking model, a fracture mechanics interface debonding criterion, and a statistical fiber failure model are used to determine the spacing of matrix cracks, the debonded length of interface, and the volume fraction of failed fibers. By combining the shear lag model and the three damage models, the stress–strain curve at each damage stage is constructed and an exact method for predicting the toughness and strength of the composites is established. The tensile stress–strain curves predicted by the present analysis agree well with experimental data.