In this work,Fe_3Si–Si_3N_4–Al_2O_3 composites were prepared at 1300°C in an N_2 atmosphere using fused corundum and tabular alumina particles,Al_2O_3 fine powder,and ferrosilicon nitride(Fe_3Si–Si_3N_4) as raw materials and thermosetting phenolic resin as a binder.The effect of ferrosilicon nitride with different concentrations(0wt%,5wt%,10wt%,15wt%,20wt%,and 25wt%) on the properties of Fe_3Si–Si_3N_4–Al_2O_3 composites was investigated.The results show that the apparent porosity varies between 10.3% and 17.3%,the bulk density varies from 2.94 g/cm~3 and 3.30 g/cm~3,and the cold crushing strength ranges from 67 MPa to 93 MPa.Under the experimental conditions,ferrosilicon nitride,whose content decreases substantially,is unstable;part of the ferrosilicon nitride is converted into Fe_2C,whereas the remainder is retained,eventually forming the ferrosilicon alloy.Thermodynamic assessment of the Si_5AlON_7 indicated that the ferrosilicon alloy accelerated the reactions between Si_3N_4 and α-Al_2O_3 fine powder and that Si in the ferrosilicon alloy was nitrided directly,forming β-Si Al ON simultaneously.In addition,fused corundum did not react directly with Si_3N_4 because of its low reactivity. In this work, Fe_3Si-Si_3N_4-Al_2O_3 composites were prepared at 1300 ° C in an N_2 atmosphere using fused corundum and tabular alumina particles, Al_2O_3 fine powder, and ferrosilicon nitride (Fe_3Si-Si_3N_4) as raw materials and thermosetting phenolic resin as a binder The effect of ferrosilicon nitride with different concentrations (0 wt%, 5 wt%, 10 wt%, 15 wt%, 20 wt%, and 25 wt%) on the properties of Fe 3 Si-Si 3 N 4 -Al 2 O 3 composites was investigated. Between 10.3% and 17.3%, the bulk density varies from 2.94 g / cm ~ 3 and 3.30 g / cm ~ 3, and the cold crushing strength ranges from 67 MPa to 93 MPa. substantially, is unstable; part of the ferrosilicon nitride is converted into Fe_2C, and the remainder is retained, eventually forming the ferrosilicon alloy. Thermodynamic assessment of the Si_5AlON_7 indicates that the ferrosilicon alloy accelerated the reactions between Si _3N_4 and α-Al_2O_3 fine powder and that Si in the ferrosilicon alloy were nitrided directly, forming β-Si Al ON simultaneously. In addition, fused corundum did not react directly with Si_3N_4 because of its low reactivity.