Fabrication and characterisation of high-performance joints made of ZrB2-SiC ultra-high temperature ceramics

• ZrB2-SiC ceramics were joined using Ni foil filler and spark plasma sintering. Joining mechanisms of identified. Mechanical tests performed to evaluate the mechanical properties fabricated joints. Oxidation behaviour joint was characterised analysed over a wide range temperature. is crucial for ultra-high temperature (UHTCs) be used in demanding environments due difficulty manufacturing large complex ceramic components. In this study, ZrB 2 -SiC composite UHTCs parts via as filler, oxidation -SiC/Ni/ZrB (ZS/Ni/ZS) investigated. Firstly, dense composites prepared from nano-sized powders by sintering (SPS). The then SPS. Furthermore, elastic modulus, hardness, shear strength high ZS/Ni/ZS examined its performance. experimental results showed that effectively SPS resultant microstructures free any marked defects or residual metallic layers joint. Although modulus hardness joining zone lower than those base ceramics, reached ?161 MPa, demonstrating satisfactory properties. revealed possesses good resistance elevated temperatures (800–1600 o C), paving way employment extreme environments.