Fracture response of structural ceramics combined with electrical functions

Fiber reinforced Si 3 N 4 matrix ceramics combined with electrical conductive phases of carbon fiber (C f ) and WC were fabricated by hot pressing. The function of fracture response of the materials was evaluated by measuring simultaneously load-deflection and electrical resistance – deflection curves in four points bending tests. The electrical resistance change closely corresponded to the fracture behavior of the materials. The variation in electrical conductive phases facilitates the detection of different stages of fracture in fiber reinforced ceramic materials.