A novel surface honeycomb modification was developed by pre-oxidizing the C_f/SiC composite, and the honeycomb modified C_f/SiC composite and stainless steel were brazed with AgCuTi filler. Results showed that a honeycomb-like surface with dense pores could be obtained when the C_f/SiC composite was air-oxidized at 700°C. During the brazing process, the liquid filler infiltrated into the pores and formed an infiltrated area, which not only significantly increased the bonding area between the reaction layer and the C_f/SiC composite, but also effectively hindered the crack propagation due to the nailing/pinning effect. The Finite Element simulation displayed that the infiltrated area transferred the stress concentration away from the reaction layer, dispersed the residual stress and reduced the corresponding stress value. As the result, the maximum shear strength of the joint reached 158MPa, which is multiple times higher than the joint without surface honeycomb modification.

通过对C _f /SiC 复合材料进行预氧化，开发了一种新型的表面蜂窝改性材料，并将蜂窝改性的C _f /SiC 复合材料与不锈钢用AgCuTi 填料钎焊。结果表明，C _f /SiC 复合材料在 700 ℃下空气氧化后，可以获得具有致密孔隙的蜂窝状表面。在钎焊过程中，液态填料渗入孔隙中，形成渗透区，不仅显着增加了反应层与C _f的结合面积/SiC 复合材料，但由于钉/钉效应，也有效地阻碍了裂纹扩展。有限元模拟表明，渗入区使应力集中远离反应层，分散了残余应力，降低了相应的应力值。结果，接头的最大剪切强度达到了158MPa，比没有表面蜂窝改性的接头高出数倍。