(上海交通大学 材料科学与工程学院，轻合金精密成型国家工程研究中心，上海 200240)
摘 要: 本文先从固体材料的点燃理论、燃烧扩展模型等方面详细阐述了镁合金点燃及燃烧机理，然后对镁合金点燃和燃烧特性的评估方法进行了总结，最后详细分析了环境气氛、测试方法、样品尺寸、材料热惯性、氧化膜以及合金元素等对镁合金点燃及燃烧特性的影响，旨在系统地理解镁合金的点燃及燃烧行为，为推动镁合金在航空航天领域的应用提供理论支撑。
关键字: 镁合金；点燃机理；点燃特性；燃烧机理；氧化膜
（National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China）
Abstract:Magnesium alloys, the lightest metal structural materials, have broad application prospects in automotive, 3C and aerospace due to their high specific strength, high damping, and excellent casting performance. However, the characteristics of easy ignition and flammability have greatly restricted the application of magnesium alloys in the aerospace field. To overcome the existing barriers, a breakthrough must be made in understanding and regulating the ignition and flammability characteristics of magnesium alloys. This article elaborated the ignition and combustion mechanisms of magnesium alloys from the aspects of ignition theories and combustion expansion models; then summarized the evaluation methods of ignition characteristics and flammability characteristics of magnesium alloys; finally analyzed the effects of atmosphere, test methods, geometrical size, thermal inertia, oxide film and alloying elements on the ignition and flammability characteristics of magnesium alloys. It aims to systematically understand the ignition and combustion behaviors of magnesium alloys and provide theoretical support for the advancement of magnesium alloys in the aerospace field.
Key words: magnesium alloy; ignition mechanism; ignition characteristics; combustion mechanism; oxide film
