Formation of Ti 3 SiC 2 interphase coating on SiC f /SiC composite by electrophoretic deposition

To improve the oxidation resistance of SiC composites at high temperature, the feasibility of using Ti 3 SiC 2 coated via electrophoretic deposition (EPD) as a SiC fiber reinforced SiC composite interphase material was studied. Through fiber pullout, Ti 3 SiC 2 , due to its lamellar structure, has the possibility of improving the fracture toughness of SiC f /SiC composites. In this study, Ti 3 SiC 2 coating was produced by EPD on SiC fiber; using Ti 3 SiC 2 ‐coated SiC fabric, SiC f /SiC composite was fabricated by hot pressing. Platelet Ti 3 SiC 2 powder pulverized into nanoparticles through high‐energy wet ball milling was uniformly coated on the SiC fiber in a direction in which the basal plane of the particles was parallel to the fiber. In a 3‐point bending test of the SiC f /SiC composite using Ti 3 SiC 2 ‐coated SiC fabric, the SiC f /SiC composite exhibited brittle fracture behavior, but an abrupt slope change in the strength‐displacement curve was observed during loading due to the Ti 3 SiC 2 interphase. On the fracture surface, delamination between each layer of SiC fabric was observed.