Al/Ti基纳米复合燃料热反应性及燃烧性能  

Thermal Reactivity and Combustion Performances of Al/Ti-based Nano-composite Fuels

作　　者：杨素兰 张皓瑞 聂洪奇 严启龙 YANG Sulan;ZHANG Haorui;NIE Hongqi;YAN Qilong(Science and Technology on Combustion,Internal Flow and Thermo-Structure Laboratory,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China)

机构地区：[1]西北工业大学燃烧、热结构与内流场重点实验室,陕西西安710072

出　　处：《兵工学报》2023年第4期1118-1125,共8页Acta Armamentarii

基　　金：国家自然科学基金与中国工程物理研究院联合基金项目(2030202);西北工业大学博士学位论文创新基金项目(CX2021048)。

摘　　要：为有效促进Al/Ti金属间反应,利用高能球磨法制备Al/Ti@AP/NC和Al/Ti@PVDF/CL-20两种核壳型复合燃料。采用扫描电子显微镜评估复合颗粒的包覆效果,利用综合热分析仪研究复合燃料的热反应性能,通过氧弹燃烧仪测试复合燃料的能量性能,借助综合燃烧诊断系统研究复合燃料的燃烧特性,利用扫描电子显微镜和X射线衍射仪研究Al/Ti基复合燃料燃烧产物的形貌及成分。研究结果表明:采用高能球磨法可使含能复合物均匀包覆在Al/Ti表面;Al/Ti的加入促进了含能复合物分解,同时含能复合物包覆增强了Al/Ti金属间反应、提高了燃料的火焰传播速度和燃烧波温度;尤其是采用AP/NC含能复合物为包覆层的复合燃料,其火焰传播速度(246.6 mm/s)较相同配方未包覆含能复合物的Al/Ti(23.5m/s)增加了9.5倍,燃烧波温度(1703.2℃)较Al/Ti(1069.3℃)提高了59.3%。复合燃料凝聚相燃烧产物成分取决于包覆物元素组成,凝聚相燃烧产物主要包含AlTi_(2)C和Ti(O_(0.19)C_(0.53)N_(0.32)),表明在燃烧过程中Al/Ti与含能复合物发生了化学反应。To effectively promote the intermetallic reaction between Al and Ti,two types of core-shell structured nanocomposite fuels have been prepared by using the high-energy ball milling method,namely Al/Ti@AP/NC and Al/Ti@PVDF/CL-20.The quality of the coating layers of AP/NC and PVDF/CL-20 on the surface of Al/Ti is inspected by scanning electron microscopy(SEM).The thermal reactivity,heat of reaction and combustion performances of Al/Ti-based composite fuels are evaluated by DSC/TG thermal analyses,a bomb calorimeter,and a customized combustion diagnostic system.The morphologies and compositions of the condensed combustion products(CCPs)are characterized by SEM and X-ray diffraction(XRD)techniques,respectively.Results show that the core-shell structured Al/Ti@AP/NC and Al/Ti@PVDF/CL-20 could be obtained by high-energy ball milling method.The thermal decomposition of the energetic composites is enhanced with the introduction of Al/Ti.Furthermore,the intermetallic reaction between Al and Ti,burning rate,and the combustion wave temperature could be enhanced with the inclusions of AP/NC or PVDF/CL-20.In particular,for the composite fuel coated with AP/NC,the burning rate(246.6 mm·s^(-1))is increased by 9.5 times and the combustion wave temperature(1703.2℃)is 59.3%higher compared to that of pure Al/Ti(the burning rate and combustion wave temperature are 23.5 mm·s^(-1)and 1069.3℃,respectively).The compositions of the CCPs depend on the types of energetic coating layers,which are dominated with AlTi_(2)C and Ti(O_(0.19)C_(0.53)N_(0.32)),indicating that chemical reactions occur between Al/Ti and energetic composites during the combustion process.

关 键 词：纳米复合燃料 Al基 燃烧性能 热反应性 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]