In the present work, WC preforms with varied amounts of ZrC nanopowder (0–3.5 vol.%) were prepared using gel-casting base on nontoxic sodium alginate and then reactively infiltrated by molten Zr₂Cu through displacive compensation of porosity method. The influence of ZrC nanopowder addition on the relative density, phase composition, microstructure, and properties of the final composites were investigated. The relative density, Vickers hardness, and flexural strength of the resulted composites prepared by reactive infiltration first increased and then decreased with increasing fraction of ZrC nanopowder in WC preforms. When the added fraction of ZrC nanopowder was 1.5 vol.%, the relative density, hardness, and flexural strength of the resulted composite reached their maximum values of about 97.3± 1%, 10.9± 0.3 GPa, and 503± 3 MPa, respectively. Fractography studies revealed that the fracture mode of composites was predominately intergranular. The W-ZrC composite was ablated by an oxyacetylene flame for 60 s. The mean value of mass and linear ablation rates of the composite were 2.1 ± 0.1 mg/s and 2.9 ± 0.3 μm/s, respectively. W-ZrC composites fabricated in complex and near net shapes at modest temperature and at ambient pressure by a reactive infiltration process can be utilized in aerospace applications.

在目前的工作中，使用无毒藻酸钠凝胶浇铸制备了具有不同ZrC纳米粉量（0-3.5％（体积））的WC预成型坯，然后通过熔融Zr ₂渗透入其中。铜通过置换孔隙率法补偿。研究了ZrC纳米粉的添加对最终复合材料的相对密度，相组成，微观结构和性能的影响。通过反应浸渗制备的复合材料的相对密度，维氏硬度和抗弯强度首先随着WC预成型坯中ZrC纳米粉的比例增加而增加，然后降低。当ZrC纳米粉的添加量为1.5体积％时，所得复合材料的相对密度，硬度和抗弯强度分别达到其最大值，分别为约97.3±1％，10.9±0.3GPa和503±3MPa。断口扫描研究表明，复合材料的断裂模式主要是晶间的。W-ZrC复合材料被氧乙炔火焰烧蚀60 s。复合材料的质量平均值和线性消融速率分别为2.1±0.1 mg / s和2.9±0.3μm/ s。W-ZrC复合材料通过反应渗透工艺在适中的温度和环境压力下以复杂和接近最终形状制造，可用于航空航天应用。