In this study, activated nano TaC was introduced into WC-Co cemented carbides to enhance their comprehensive performance properties. Changes of mechanical properties, elements distributions, phase constitutions and microstructures of the cemented carbides were examined as a function of TaC amount. It was found that due to the addition of activated nano TaC, nanoscale Co-rich particles and cubic-Ta₄C₃ precipitates were induced and dispersed within WC grains, which had good coherent interfacial relationship with the hard matrix. The combined strengthening effects of the nano precipitates and solid solution in WC resulted in excellent comprehensive mechanical properties of the cemented carbides. Particularly, the rupture strength has achieved the highest among those of the counterparts reported in the literature so far. This study opens a new perspective to use activated nano compound particles to modulate hard phases of cermet materials for high comprehensive performance.

在这项研究中，将活性纳米TaC引入WC-Co硬质合金以增强其综合性能。考察了硬质合金的力学性能，元素分布，相组成和微观结构的变化与TaC量的关系。发现由于添加了活化的纳米TaC，纳米级富Co颗粒和立方Ta ₄ C ₃沉淀物被诱导并分散在WC晶粒内，与硬质基体具有良好的连贯界面关系。WC中纳米沉淀物和固溶体的联合强化作用导致硬质合金具有出色的综合机械性能。特别是，迄今为止，断裂强度在文献中报道的同类产品中最高。这项研究为使用活化的纳米复合颗粒调节金属陶瓷材料的硬相以获得更高的综合性能开辟了新的前景。