(1. 湖南大学 材料科学与工程学院，长沙 410082；2. 淮海工学院 机械工程学院，连云港 222005)
摘 要: 为研究SiCP/Al-Fe-V-Si复合材料的热稳定性，对多层喷射沉积技术制备的SiC颗粒增强Al-Fe-V-Si合金经过不同温度下的热稳定性实验后进行了硬度检测，并对其显微组织进行了电镜观察。结果表明：随着基体合金材料中Fe含量的提高，复合材料的组织和力学性能具有更好的高温稳定性。添加SiC颗粒后，SiC颗粒向基体中注入Si，由于基体中Si浓度的提高，减慢了合金中第二相弥散粒子的粗化和分解，与未添加SiC颗粒的合金材料相比，添加SiC颗粒复合材料的组织和力学性能具有更好的高温稳定性。
关键字: 多层喷射沉积；SiC；Al-Fe-V-Si合金；热稳定性
（1. College of Materials Science and Engineering, Hunan University, Changsha 410082;2. College of Mechanical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China）
Abstract:The Al-Fe-V-Si alloys reinforced with SiC particles were prepared by multi –layer spray deposition, the hardness was measured by Brinell hardness tester, and the microstructures were observed by TEM. The results show that, with Fe content in the composites increasing, the thermostability of the composites is improved further. The SiC particles injecting Si into matrix slow the coarsening and decomposition of second-phase dispersion particulates by elevation of Si concentration. Compared with alloys without SiC particles, the alloys with SiC particles are characterized with microstructure and mechanical property of better thermostability.
Key words: multi-layer spray deposition; SiC; Al-Fe-V-Si alloy; thermostability
