摘要
针对推进剂、混合炸药对新型金属合金燃料的使用需求,采用绝氧-闭环高速离心雾化法制备了Si含量分别为12%和20%球形Al-Si合金燃料(Al-12Si和Al-20Si)。采用扫描电镜(SEM)、X-射线粉末衍射(XRD)、金相分析对合金燃料的结构及组成进行了表征,采用氧弹量热仪、热重与差示扫描量热联用(TG-DSC)对燃料的燃烧热和热氧化特性进行了研究,在550,620,1000℃及1200℃下原位取样测试了Al-20Si热氧化产物的形貌及组成。结果表明,Al-Si合金燃料为典型的球形壳核结构,表面主要是由初晶Si片组成的"壳",其尺寸随合金燃料粒度的增大而增大,内部是网状Si骨架立体结构。Al-12Si的燃烧热为29.285 kJ·g^-1,热氧化反应至1200℃增重为51.17%;Al-20Si的燃烧热为29.039 kJ·g^-1,热氧化反应至1200℃增重为43.33%。
To satisfy the application of new type of metal alloy fuels in propellants and explosives,the spherical Al-Si alloy fuels with Si mass fraction of 12% and 20% were prepared by high-speed centrifugal atomization with absent-oxygen atmosphere.SEM,XRD,metallographic analysis were taken to study the structures and the constitutions of the alloys. Oxygen bomb calorimeter and TG-DSC were used to investigate the heat of combustion and thermal oxidation characteristics of the fuels. The morphologies and components of Al-20 Si thermal oxidation products were tested in situ at 550,620,1000 ℃ and 1200 ℃. Results show that the Al-Si particles are typical spherical,and core-shell structures. The shell is mainly formed from primary silicon and its particle size increases with an increased in the particle size of the alloy fuel. The cores is a three-dimensional structure of reticulated Si skeleton. The heat of combustion of Al-12 Si is 29.285 kJ·g^-1,and the mass of thermal oxidation reaction to 1200 ℃ is 51.17%.The heat of combustion of Al-20 Si is 29.039 kJ·g^-1,and the mass of thermal oxidation reaction to 1200 ℃ is 43.33%.
作者
闫石
潘兵
袁庆庆
王家鹏
焦清介
杜风贞
YAN Shi;PAN Bing;YUAN Qing-qing;WANG Jia-peng;JIAO Qing-jie;DU Feng-zhen(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Liaoyang Military Representative Office of Army Equipment Department,Shenyang 111000,China;Tangshan Weihao Magnesium Powder Co.,Ltd,Tangshan 064406,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2020年第8期766-772,共7页
Chinese Journal of Energetic Materials
基金
国家自然科学基金资助(21905024)
装发重点实验室项目。
关键词
Al-Si合金燃料
高速离心雾化
壳核结构
热氧化机理
Al-Si alloy fuel
high speed centrifugal atomization
core-shell structure
thermal oxidation reaction mechanism
