B Steps of Fracture Crack bifurcation N4-50wt° oTIN layer Figure 3 Fracture surface of Si3 Na/Si3 N4-50% wt %TiN composite (A)and(C)SEI image: (B)and(D)backscattered image. Surface under tension Surface under tension B Figure 4(A)A schematic drawing of a crack bifurcation during the fracture in Si3 N4/Si3 N4-TiN laminates:(B)An optical photograph of the Si3 N4/Si3 N4-50 wt %TiN laminate bar after fracture. 5448Figure 3 Fracture surface of Si3N4/Si3N4-50% wt.%TiN composite. (A) and (C) SEI image; (B) and (D) backscattered image. Figure 4 (A) A schematic drawing of a crack bifurcation during the fracture in Si3N4/Si3N4-TiN laminates; (B) An optical photograph of the Si3N4/Si3N4-50 wt.%TiN laminate bar after fracture. 5448