Joining of SiC ceramics was successfully achieved at a relatively low temperature of 1500 °C without any pressure using pure polycarbosilane (PCS) as the joining material, which was distributed homogenously on the surface of SiC monolith through a screen printing method. The XRD pattern shows that the pyrolysis product of PCS is single-phase SiC. The interlayer thickness of the SiC joint is approximately 2 μm. This ultra-thin interlayer with lower possibility of the existence of defects contributes to the average shear strength of 105.8 ± 10.4 MPa, higher than that of other works using other preceramic polymers to the best of our knowledge. Due to the simplicity, low cost and high joining strength, the screen printing method using PCS as the joining material has good practicality in SiC ceramics joining.

使用纯聚碳硅烷（PCS）作为接合材料，可以在1500°C的相对较低的温度下成功地完成SiC陶瓷的接合，该接合材料通过丝网印刷方法均匀地分布在SiC整料的表面上。XRD图谱表明，PCS的热解产物为单相SiC。SiC接头的层间厚度约为2μm。据我们所知，这种极薄的夹层具有较低的缺陷可能性，平均剪切强度为105.8±10.4 MPa，高于使用其他陶瓷材料的其他材料的平均剪切强度。由于简单，低成本和高接合强度，使用PCS作为接合材料的丝网印刷方法在SiC陶瓷接合中具有良好的实用性。