In this work, bulk Zr₃Al₃C₅-based ceramics were synthesized by the infiltration of Al-Si melt into zirconium carbide (ZrC) perform. The phase composition, microstructure, and mechanical properties of as-fabricated ceramics were studied. The results demonstrate that Si is more effective to reduce the twin boundary energy of ZrC than Al, and thus promotes the decrease of formation temperature of Zr₃Al₃C₅. With the infiltration temperatures increasing from 1200 to 1500 °C, the Zr₃Al₃C₅ content increases from 10 to 49 vol%, which is contributed to the increase of flexural strength from 62±9 to 222±10 MPa, and fracture toughness (K_IC) from 2.8±0.2 to 4.1±0.3 MPa·m^1/2. The decrease of mechanical properties for the samples fabricated at 1600 °C is ascribed to the abnormal growth of Zr₃Al₃C₅ grains.

在这项工作中，通过将Al-Si熔体渗入碳化锆（ZrC）中来合成块状Zr ₃ Al ₃ C ₅基陶瓷。研究了陶瓷的相组成，显微组织和力学性能。结果表明，Si比Al更有效地降低ZrC的孪生边界能，从而促进了Zr ₃ Al ₃ C ₅的形成温度的降低。随着渗透温度从1200°C升高到1500°C，Zr ₃ Al ₃ C ₅含量从10vol％增加到49vol％，这有助于弯曲强度从62±9增加到222±10 MPa，断裂韧性（K _IC）从2.8±0.2增加到4.1±0.3 MPa·m ^1/2。Zr ₃ Al ₃ C ₅晶粒的异常生长归因于在1600°C下制造的样品的机械性能下降。