Facile joining of SiC ceramics with screen-printed polycarbosilane without pressure

•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.•The ultra-thin interlayer contributes to the average shear strength of 105.8 ± 10.4 MPa.•The screen printing method using PCS as the joining material has good practicality in SiC ceramics joining.