The Fabrication and Mechanical Properties of Laminated ZrB2-Mo5SiB2 Ceramics with an Mo-Mo5SiB2 Interlayer

The excellent physical and chemical properties of ultra-high temperature ceramics make them suitable for many high-temperature structural components, while their poor toughness high sintering become key limitations to application. Laminated toughening has long been considered an effective method improve the mechanical ceramics. In this study, laminated ZrB2-Mo5SiB2 with Mo-Mo5SiB2 interlayer were fabricated by tape casting hot press at 1900 °C 2 h. Different layer thickness ratios between matrix designed illustrate mechanism. Both fracture flexural strength showed a trend first increasing then decreasing increase ratio. High (9.89 ± 0.26 MPa·m1/2) (431.6 15.1 MPa) obtained when ratio was 13. improvement in could be attributed generation residual stress, deflection bifurcation cracks. Residual stress that developed also evaluated.