Materials design and processing of high temperature ceramic matrix composites: state of the art and future trends

The material design of ceramic matrix composites (CMCs) is discussed in ter ms of fiber nature and architecture, interphases (pyrocarbon, BN, multilaye rs), matrices and seal-coating, taking into account lifetime considerations . CMCs are processed by liquid or gas phase routes. Besides the well establ ished processing routes, such as polymer impregnation and pyrolysis (PIP), slurry impregnation/hot pressing (SMP) and isothermal/isobaric chemical vap or infiltration (I-CVI) techniques, emerging processes allowing densificati on times of the order of a day, are discussed.