(上海交通大學(xué) 材料科學(xué)與工程學(xué)院，輕合金精密成型國家工程研究中心，上海 200240)
摘 要: 本文先從固體材料的點(diǎn)燃理論、燃燒擴(kuò)展模型等方面詳細(xì)闡述了鎂合金點(diǎn)燃及燃燒機(jī)理，然后對鎂合金點(diǎn)燃和燃燒特性的評估方法進(jìn)行了總結(jié)，最后詳細(xì)分析了環(huán)境氣氛、測試方法、樣品尺寸、材料熱慣性、氧化膜以及合金元素等對鎂合金點(diǎn)燃及燃燒特性的影響，旨在系統(tǒng)地理解鎂合金的點(diǎn)燃及燃燒行為，為推動鎂合金在航空航天領(lǐng)域的應(yīng)用提供理論支撐。
關(guān)鍵字: 鎂合金；點(diǎn)燃機(jī)理；點(diǎn)燃特性；燃燒機(jī)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
