Ceramic matrix composites classification

Composite interfaces, ceramic—matrix composites, 5 558-561 Composite liner, in landfills, 25 877 Composite material coatings, 14 105 Composite materials, 13 533 26 750-785. See also Composites advanced materials in, 1 693 classification by geometry, 26 752-755 classification by matrix material,... 

This review is intended to focus on ceramic matrix composite materials. However, the creep models which exist and which will be discussed are generic in the sense that they can apply to materials with polymer, metal or ceramic matrices. Only a case-by-case distinction between linear and nonlinear behavior separates the materials into classes of response. The temperature-dependent issue of whether the fibers creep or do not creep permits further classification. Therefore, in the review of the models, it is more attractive to use a classification scheme which accords with the nature of the material response rather than one which identifies the materials per se. Thus, this review could apply to polymer, metal or ceramic matrix materials equally well. 

Another type of classification can be done on the basis of filler or reinforcing agent used namely polymer matrix composites (PMCs), metal matrix composites (MMCs), ceramic matrix composites (CMCs), carbon-carbon matrix composites (CCCs), intermetallic... 

The classification of C/C composites, and ceramic matrix composites, is generally based on the number of directions of the reinforcement architecture. Sometimes it is also completed by the nature of the fiber and/or of the matrix. Occasionally it can also take into account a physical characteristic (high or low density high or low thermal conductivity). A more sophisticated classification is under development, based on the type of fiber, reinforcement architecture, matrix type, fiber fraction volume, density, porosity, tensile strength, and modulus at room temperature (ASTM WK49676). 

Fibrous reinforced composites are sometimes classified according to matrix type within this scheme are three classifications polymer-, metal-, and ceramic-matrix composites. 

Fiber-Matrix Composites. As shown in Figure 1.75, there are two main classifications of FMCs those with continuous fiber reinforcement and those with discontinuous fiber reinforcement. Continuous-flber-reinforced composites are made from fiber rovings (bundles of twisted filaments) that have been woven into two-dimensional sheets resembling a cloth fabric. These sheets can be cut and formed to a desired shape, or preform, that is then incorporated into a composite matrix, typically a thermosetting resin such as epoxy. Metallic, ceramic, and polymeric fibers of specific compositions can all be produced in continuous fashions, and the properties of the... 

Composites with ceramic matrix were first introduced into the classification system by Kriegesmaim [12]. In Table 7 composites with ceramic matrix have been added, so that now five subgroups are included. 

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