摘 要:采用硬度和三点抗弯强度研究了用自蔓延燃烧合成 SiC-Si₃N₄复合材料的力学性能。 实验结果显示，当 SiC 质量分数为 15%时，复 合材料性能较好。同时比较了上述复合材料与同样质量分数的机械混 合粉制备的 SiC-Si₃N₄ 陶瓷材料的机械性能。 结果显示，混合粉制备 的复合材料性能优于直接合成复合材料的性能。 

关键词：SiC-Si₃N₄ 复合材料；力学性能；硬度；抗弯强度

Abstract: The hardness and three points bend strength of SiC-Si₃N₄composite materials with different SiC content which were made by the method of self-propagating combustion synthesis(SHS) were investigat ed. The results showed that the properties of SiC-Si₃N₄ composite materi als with 15% SiC (mass fraction) were significantly superior compared with the one of others . The mechanical properties of SiC-Si₃N₄ materials with the same SiC contents， prepared with the mixing powder of SiC and Si₃N₄ were compared with the one of materials from SHS. It was also in dicated that the properties of the SiC-Si₃N₄ materials made from the mix ture powder showed slight higher than those of one made from SHS pow der. 

Keywords: SiC -Si₃N₄ composite materials；mechanical properties； hardness； bend strength