Combining spray drying and in-situ synthesized technology, WC-10Co cemented carbides with uniform composition was prepared by vacuum sintering to investigate the effects of different CeO₂ contents (0 wt%, 0.5 wt%, 1 wt%, 2 wt%, 4 wt%) as well as co-doping with CeO₂ and VC on the microstructure and mechanical properties. With increasing CeO₂ addition from 0 wt% to 0.5 wt%, the WC grain size decreased from 0.79 ± 0.35 μm to 0.62 ± 0.24 μm. The hardness, fracture toughness and transverse rupture strength (TRS) of the alloy with 0.5 wt% CeO₂ all reached the maximum values of 1752 ± 28 HV₃₀, 18.50 ± 0.35 MPa·m^1/2 and 2245 ± 35 MPa, respectively, which indicated that the mechanical properties of cemented carbide could be simultaneously improved by adding 0.5 wt% CeO₂ to refine the WC grains. However, as the CeO₂ content increased to 4 wt%, the hardness gradually decreased, while the fracture and TRS all slightly decreased first and then tended to be stable. Moreover, the corrosion resistance of alloys first increased and then decreased with the increase of CeO₂ content. The 0.5 wt% CeO₂ alloy had the best corrosion resistance. After adding 0.5 wt% VC, the grain size of alloys became smaller and distribution of Co binder was more uniform. Compared to the samples with only added CeO₂, the alloy with co-addition of 0.5 wt% CeO₂ and 0.5 wt% VC exhibited the best comprehensive mechanical properties. The hardness, fracture toughness and TRS of the alloy with co-addition of 0.5 wt% CeO₂ and 0.5 wt% VC were 1987 ± 44 HV₃₀, 16.10 ± 0.34 MPa·m^1/2 and 2023 ± 78 MPa, respectively.

结合喷雾干燥和原位合成技术，通过真空烧结制备了成分均匀的WC-10Co硬质合金，研究了不同CeO ₂含量（0 wt%、0.5 wt%、1 wt%、2 wt%、4 wt%）以及与CeO ₂和VC共掺杂对微观结构和机械性能的影响。随着 CeO ₂添加量从 0 wt% 增加到 0.5 wt%，WC 晶粒尺寸从 0.79 ± 0.35 μm 减小到 0.62 ± 0.24 μm。_{0.5 wt% CeO 2}合金的硬度、断裂韧性和横向断裂强度（TRS）均达到最大值1752±28 HV ₃₀、18.50±0.35 MPa·m ^1/2_{和 2245 ± 35 MPa，这表明通过添加 0.5 wt% CeO 2}细化 WC 晶粒可以同时提高硬质合金的力学性能。但随着CeO ₂含量增加到4 wt%，硬度逐渐下降，而断口和TRS均先小幅下降后趋于稳定。_{此外，随着CeO 2}含量的增加，合金的耐腐蚀性能先升高后降低。0.5 wt% CeO ₂合金具有最好的耐腐蚀性。添加0.5 wt% VC后，合金晶粒尺寸变小，Co粘结剂分布更均匀。与仅添加 CeO _{2的样品相比}，共添加0.5 wt% CeO ₂和0.5 wt% VC的合金表现出最好的综合力学性能。共添加0.5 wt% CeO ₂和0.5 wt% VC的合金的硬度、断裂韧性和TRS分别为1987 ± 44 HV ₃₀、16.10 ± 0.34 MPa·m ^1/2和2023 ± 78 MPa。