(1. 湖南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410082；2. 淮海工學(xué)院 機械工程學(xué)院，連云港 222005)
摘 要: 為研究SiCP/Al-Fe-V-Si復(fù)合材料的熱穩(wěn)定性，對多層噴射沉積技術(shù)制備的SiC顆粒增強Al-Fe-V-Si合金經(jīng)過不同溫度下的熱穩(wěn)定性實驗后進行了硬度檢測，并對其顯微組織進行了電鏡觀察。結(jié)果表明：隨著基體合金材料中Fe含量的提高，復(fù)合材料的組織和力學(xué)性能具有更好的高溫穩(wěn)定性。添加SiC顆粒后，SiC顆粒向基體中注入Si，由于基體中Si濃度的提高，減慢了合金中第二相彌散粒子的粗化和分解，與未添加SiC顆粒的合金材料相比，添加SiC顆粒復(fù)合材料的組織和力學(xué)性能具有更好的高溫穩(wěn)定性。
關(guān)鍵字: 多層噴射沉積；SiC；Al-Fe-V-Si合金；熱穩(wěn)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
