An Fe Mo-alloy-doped β-Si Al ON(Fe Mo/β-Si Al ON) composite was fabricated via a reaction-bonding method using raw materials of Si, Al2O3, Al N, Fe Mo, and Sm2O3. The effects of Fe Mo on the microstructure and mechanical properties of the composite were investigated. Some properties of the composite, including its bending strength at 700°C and after oxidization at 700°C for 24 h in air, thermal shock resistance and corrosion resistance to molten aluminum, were also evaluated. The results show that the density, toughness, bending strength, and thermal shock resistance of the composite are obviously improved with the addition of an Fe Mo alloy. In addition, other properties of the composite such as its high-temperature strength and oxidized strength are also improved by the addition of Fe Mo alloy, and its corrosion resistance to molten aluminum is maintained. These findings indicate that the developed Fe Mo/β-Si Al ON composite exhibits strong potential for application to molten aluminum environments. An Fe Mo-alloy-doped β-Si Al ON (Fe Mo / β-Si Al ON) composite was fabricated via a reaction-bonding method using raw materials of Si, Al2O3, Al N, Fe Mo, and Sm2O3. of Fe Mo on the microstructure and mechanical properties of the composite were investigated. Some properties of the composite, including its bending strength at 700 ° C and after oxidization at 700 ° C for 24 h in air, thermal shock resistance and corrosion resistance to molten The results show that the density, toughness, bending strength, and thermal shock resistance of the composite are obviously improved with the addition of an Fe Mo alloy. In addition, other properties of the composite such as its high- These findings indicate that the developed Fe Mo / β-Si Al ON composite exhibits strong potential for application to molten al uminum environments.