The Ti₂₂Si₇₈ (wt.%) braze was used to bond porous BN/Si₃N₄ ceramic. The results revealed that the joint strength was low. In order to improve the joint strength, a carbon coated modification of the porous BN/Si₃N₄ substrate, achieved by the pyrolysis of phenol-formaldehyde resin was suggested. The thickness of carbon layer was controlled by the volume ratio of phenol-formaldehyde resin and methyl alcohol (R/M). The effect of the carbon layer on the microstructure and mechanical properties of the joint was examined. It was established that the maximum joint strength was achieved at the level of 80 MPa (as opposed to the uncoated joint with only 30 MPa) when R/M was 1:2, at the given brazing temperature. The improvement of the joint strength is attributed mainly to the formation of a SiC infiltration reaction layer, a significant population of SiC nanowires, as well as TiN_0.7C_0.3 and TiB₂ particles.

Ti ₂₂ Si ₇₈（wt。％）钎焊用于粘结多孔BN / Si ₃ N ₄陶瓷。结果表明，接头强度低。为了提高接合强度，对多孔BN / Si ₃ N ₄进行了碳包覆改性有人建议通过热解酚醛树脂来获得底物。碳层的厚度由酚醛树脂和甲醇的体积比（R / M）控制。检查了碳层对接头的微观结构和机械性能的影响。可以确定的是，在给定的钎焊温度下，当R / M为1：2时，最大接头强度达到80 MPa（而不是只有30 MPa的未涂层接头）。接合强度的提高主要归因于SiC渗透反应层的形成，大量的SiC纳米线以及TiN _0.7 C _0.3和TiB ₂颗粒。