The graphite-doped SiC ceramics with net-like structure was fabricated via tape casting and pressureless sintering. The ceramics exhibited a step-like fracture mode, which could be attributed to the net-like structure composed of long columnar SiC grains, layered graphite, and the three-modal pore distribution. The formation of warped epitaxial graphene and large size graphite could be attributed to the pyrolysis of organics in the tape casting system. In the net-like structure, the SiC grains provide the high strength, whereas the layered graphite and three-modal pores were used to deflect the cracks and release the stress at the tip, following the crack-tip-shielding mechanism. The sample with a net-like structure exhibited a combination of a variety of extrinsic toughening mechanisms, such as crack deflection, crack bridging, crack branching and delamination, pull-out, and rupture of layered graphite, which led to improved fracture toughness of 7 MPa m^1/2, flexural strength of 400 MPa, and (work of fracture) WOF of 3.3 kJ m⁻². When increasing the graphite content, the electrical conductivity of the graphite-doped SiC ceramics significantly increased from 7.15 × 10⁻⁴ to 216 S/m. The high shielding effectiveness of 34.1 dB was due to the multi-absorption on the various surfaces during the multi-reflection by the net-like structure.

通过流延铸造和无压烧结制备了网状结构的掺杂石墨的SiC陶瓷。陶瓷表现出阶梯状断裂模式，这可以归因于由长柱状SiC晶粒，层状石墨和三峰孔隙分布组成的网状结构。弯曲的外延石墨烯和大尺寸石墨的形成可以归因于带铸系统中有机物的热解。在网状结构中，SiC晶粒提供了高强度，而层状石墨和三峰孔隙被用来使裂纹变形并释放裂纹的尖端应力，遵循裂纹尖端的屏蔽机制。具有网状结构的样品表现出多种外部增韧机制的组合，例如裂纹挠度，裂纹桥接，^1/2，抗弯强度为400 MPa，（断裂功）WOF为3.3 kJ m ^-2。当增加石墨含量时，掺杂石墨的SiC陶瓷的电导率从7.15×10 ^-4显着增加到216 S / m。34.1 dB的高屏蔽效果归因于网状结构在多次反射过程中在各种表面上的多次吸收。