Topic
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.
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TL;DR: In this paper, a finite element analysis of failure probabilities for a 2D SiC/SiC composite reinforced with fabrics of fiber bundles was used to predict the matrix damage evolution.
Abstract: The matrix damage evolution in a 2-D SiC/SiC composite reinforced with fabrics of fiber bundles was predicted from properties of basic constituents using a finite element analysis of failure probabilities. Failure probabilities were computed using a finite element post processor including the multiaxial elemental strength model for handling fracture statistics under multiaxial stress-states. The associated stress–strain behavior of the selected elementary cell was derived from the stress analysis. The predicted matrix damage evolution was found in good agreement with that identified by microscopy on practical 2-D SiC/SiC woven composites under tension. The predicted stress–strain behavior and Young’s moduli compared satisfactorily with the experimental data. The approach was then applied to a cell of fully dense 2-D woven SiC/SiC composite under tension, and then to a cell of conventional 2-D woven SiC/SiC composite subject to a gradient of forces.
36 citations
TL;DR: In this article, an assembly method of SiC-based sandwich-structured CMC is presented, which is performed during sandwich manufacturing in an integrated fashion and allows the production of complex shapes at low costs.
Abstract: Sandwich structured composites have been widely studied and applied at ambient temperature in aeronautical, automobile and naval applications. For high temperature applications, an integrated ceramic sandwich structure could take advantage of multiple functions such as skin stiffness and core insulation. For thermo-structural applications, skins must be made of ceramic matrix composites (CMC) because of their strength, their resistance to high temperatures (beyond 1000 °C), and their low densities. Concerning foam cores, some carbides (e.g. SiC) are, for their outstanding thermo-mechanical properties, the most appropriate. These foams can withstand long oxidative exposing conditions with low material degradation. This paper presents an assembly method of SiC based sandwich structured CMC. It is performed during sandwich manufacturing in an integrated fashion and allows the production of complex shapes at low costs. Produced flat sandwich panels, characterized by three point bending tests, showed a marked toughening behaviour.
36 citations
TL;DR: In this paper, the high-temperature performance of a Nextel-720 fiber/Al 2 O 3 composite in air and water vapor at 1100°C was investigated using X-ray photoelectron spectroscopy (XPS) and thermodynamic calculations.
Abstract: The high-temperature performance of a Nextel-720 fiber/ Al 2 O 3 composite in air and water vapor at 1100°C was investigated using X-ray photoelectron spectroscopy (XPS) and thermodynamic calculations. In the presence of water vapor, the formation of volatile Si(OH) 4 was responsible for the loss of mullite phase in the fiber of the ceramic-matrix composite (CMC). XPS analysis revealed the formation of surface aluminosilicates for the water-vapor-exposed CMC for 1000 h.
36 citations
TL;DR: In this article, the current status of the research and development of graphene-reinforced ceramic matrix composite (CMC) materials is reviewed, with a comprehensive comparison in different ceramic matrices as oxide and non-oxide composites.
36 citations
Patent•
19 Feb 1990
TL;DR: In this paper, the authors describe a porous structure made of refractory fibers or densified by carrying out a sequential deposition of a matrix, the deposition comprising at least two chemical vapor infiltration phases of an essentially ceramic material separated by a less rigid material chosen among pyrolytic carbon and boron nitride.
Abstract: A porous structure made of refractory fibers or densified by carrying out a sequential deposition of a matrix, the deposition comprising at least two chemical vapor infiltration phases of an essentially ceramic material separated by a chemical vapor infiltration of a less rigid material chosen among pyrolytic carbon and boron nitride.
36 citations