ZrB₂ and ZrB₂-based composites have extensive applications; however, their application is hindered by their low fracture toughness at room temperature. A ZrB₂/(NbTi) composite with 60 wt% ZrB₂ was densified to 97.1% through hot-pressing sintering at 1600 °C under 30 MPa. The phase, microstructure, and room and high-temperature (800–1200 °C) mechanical properties of the composite were investigated. The composite mainly consisted of a (Ti,Nb,Zr) solid solution (ss), Nb-rich (Ti,Nb)B, Ti-rich (Nb,Ti)B, and ZrB₂. The room-temperature fracture toughness of the composite was up to 6.9 MPa·m^1/2 due to crack bridging, crack defection, and pull-out toughening mechanisms. The high temperature deformability of ZrB₂/(NbTi) improved as the test temperature increased from 800 °C to 1200 °C due to the plastic rheological behaviour of the ductile (Ti,Nb,Zr)_ss phase and the localised temperature rise. The room and high-temperature compressive deformation processes and failure mechanisms were discussed in detail.

ZrB ₂和ZrB ₂基复合材料具有广泛的应用。然而，它们的应用由于其在室温下的低断裂韧性而受到阻碍。通过在1600℃，30MPa下进行热压烧结，将具有60重量％的ZrB ₂的ZrB ₂ /（Nb Ti）复合材料致密化为97.1％。研究了复合材料的相，微观结构以及室温和高温（800-1200°C）的机械性能。复合材料主要由（Ti，Nb，Zr）固溶体（ss），富Nb（Ti，Nb）B，富Ti（Nb，Ti）B和ZrB _2组成。复合材料的室温断裂韧性高达6.9 MPa·m ^1/2由于裂纹桥接，裂纹缺陷和拉拔增韧机制。随着延性（Ti，Nb，Zr）_ss相的塑性流变行为和局部温度升高，随着测试温度从800°C升高到1200°C ，ZrB ₂ /（Nb Ti）的高温变形能力得到改善。详细讨论了室温和高温压缩变形过程和破坏机理。