Effects of CoO and Cr2O3 Composite Doping on Mechanical Properties of 17Ni/(10NiO-NiFe2O4)Cermets AITranslate

2李枝林,李志友,张雷,周科朝.17(xNi-Cu)/(NiFe_2O_4-10NiO)金属陶瓷的制备与性能[J].粉末冶金材料科学与工程,2007,12(3):187-192. 被引量：2

2任鑫明,马北越,高陟.添加Y2O3对ZrN(ZrON)-SiAlON性能的影响[J].耐火材料,2020,54(2):134-136.

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Chinese Library Classification Number:TG148[金属学及工艺—金属材料]

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The 17Ni/(10NiO-NiFe2O4)cermets doped with CoO and Cr2O3 compound additives were prepared by powder metallurgy.The phase and morphology of the cermets were analyzed by XRD and SEM,and their relative density,microhardness,fracture toughness and flexural strength were also tested.The effects of different content and ratio of CoO and Cr2O3 compound additives on the mechanical properties of the cermets were investigated.The results show that CoO and Cr2O3 compound additives are dissolved into the NiFe2O4lattice of the ceramic matrix phase,which promotes sintering densification and also results in the mechanical properties of the cermets improved.When the composite doping amount of CoO and Cr2O3 is 1%(CoO/Cr2O3 mass ratio of 1∶2),the microhardness and fracture toughness of the cermet are 740.65 N/mm^2and 9.61MPa·m^1/2,which are 7.35%and 169.19%higher than those of the undoped cermet,respectively.When the composite doping amount of CoO and Cr2O3 is 2%(CoO/Cr2O3 mass ratio of 2∶1),the flexural strength of the cermet is as high as 175.66MPa,which is 31.97%higher than that of the undoped cermet.