The W-Mo-HfC composites were prepared by using the conventional powder metallurgy with the two different sintering temperature and the same forging technology. The phase component, microstructure and mechanical properties of composites were investigated, and the effects of second phase particles were focused on particularly. The two types of W-Mo-HfC composites are composed of the WMo matrix, HfC and HfO₂ second phase particles. As a result, the W-Mo-HfC composite sintered at 2100 °C can yield a higher tensile strength of 993 MPa and a larger elastic modulus of 336.3 GPa. Firstly, a relatively lower sintering temperature gives rise to a smaller average grain size of the WMo matrix and the size of second phase particles, which effectively utilizes the fine grain strengthening mechanism. Secondly, HfC second phase particles at the grain boundary have the ability to capture oxygen impurity and increase the bonding strength of interface. In addition, the enhancement mechanisms of HfC particles were proposed.

W-Mo-HfC复合材料采用常规粉末冶金技术，采用两种不同的烧结温度和相同的锻造工艺制备而成。研究了复合材料的相组成、微观结构和力学性能，重点研究了第二相粒子的影响。这两种类型的 W-Mo-HfC 复合材料由 W Mo 基体、HfC 和 HfO ₂第二相颗粒组成。因此，在 2100 °C 下烧结的 W-Mo-HfC 复合材料可以产生 993 MPa 的更高拉伸强度和 336.3 GPa 的更大弹性模量。首先，相对较低的烧结温度会导致 W 的平均晶粒尺寸较小Mo 基体和第二相颗粒的大小，有效地利用了细晶强化机制。其次，晶界处的HfC第二相颗粒具有捕获氧杂质的能力，增加界面的结合强度。此外，还提出了 HfC 粒子的增强机制。