PTFE对Mg与Al_(12)Mg_(17)微爆反应特性的影响  

Effect of PTFE on the Micro-explosion Reaction of Mg and Al_(12)Mg_(17)

作　　者：谢晓 李海建 张言 仪建华[1] 许毅[1] 赵凤起[1] XIE Xiao;LI Hai-jian;ZHANG Yan;YI Jian-hua;XU Yi;ZHAO Feng-qi(National Key Laboratory of Energetic Materials,Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]西安近代化学研究所含能材料全国重点实验室,陕西西安710065

出　　处：《火炸药学报》2023年第8期733-740,I0003,共9页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.22075226)。

摘　　要：为了探索聚四氟乙烯(PTFE)对镁和Al_(12)Mg_(17)反应特性的影响,采用TG-DSC对样品的高温氧化行为进行测试分析;利用自搭建的高速显微观测系统对其燃烧行为进行了精细地观测;使用XRD和SEM等对反应前后样品的结构和组成等进行了分析;使用光谱仪对样品燃烧过程中的光谱辐射特性进行记录。结果表明,当PTFE在空气中加热时,PTFE分别将Mg和Al_(12)Mg_(17)的起始反应温度提高了283.3℃和368.3℃;Mg与PTFE/Mg样品燃烧过程中,均在490~505nm间观察到了MgO的辐射峰,在517和518nm处观察到了镁的辐射峰;与镁原料相比,PTFE/Mg中观察到了更加明显的微爆燃烧。对于Al_(12)Mg_(17),PTFE的加入有助于其微爆燃烧的发生,样品燃烧过程中在417.486和512nm处观察到的AlO辐射峰说明PTFE的加入可以促进Al_(12)Mg_(17)中铝的燃烧。To investigate the influence of polytetrafluoroethylene(PTFE)on the reaction characteristics of Mg and Al_(12)Mg_(17),the high-temperature oxidation behavior of the samples was analyzed by TG-DSC tests.The combustion behavior was observed in detail based on the custom-built high-speed microscopy observation system.The microstructure and composition of the samples before and after reaction were analyzed using XRD and SEM.Furthermore,a spectrometer was used to record the spectrum radiation characteristics during combustion.The results showed that the initial reaction temperatures of Mg and Al_(12)Mg_(17) in air were increased by 283.3℃and 368.3℃,respectively,adding PTFE.During the combustion process of Mg and PTFE/Mg samples,the MgO radiation peaks were observed in the range of 490 nm to 505 nm,while radiation peaks of Mg were found at 517 nm and 518 nm.Compared with raw Mg powders,more obvious micro-detonation combustion could be observed in PTFE/Mg.For Al_(12)Mg_(17),micro-explosion combustion was more likely to occur by adding PTFE.The AlO radiation peaks was observed at 417,486 nm and 512 nm during combustion,which indicated that PTFE could promoted the aluminum reaction in Al_(12)Mg_(17).

关 键 词：爆炸力学 聚四氟乙烯 PTFE 镁 Al_(12)Mg_(17) 微爆反应 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O38[理学—流体力学]