典型文献
Tuning the reactivity of Al-Ni by fine coating of halogen-containing energetic composites
文献摘要：
In this paper,various core-shell structured Al-Ni@ECs composites have been prepared by a spray-drying technique.The involved ECs refer to the energetic composites(ECs)of ammonium perchlorate/nitro-cellulose(AP/NC,NA)and polyvinylidene fluoride/hexanitrohexaazaisowurtziitane(PVDF/CL-20,PC).Two Al-Ni mixtures were prepared at atomic ratios of 1∶1 and 1∶3 and named as Al/Ni and Al/3Ni,respec-tively.The thermal reactivity and combustion behaviors of Al-Ni@ECs composites have been compre-hensively investigated.Results showed that the reactivity and combustion performance of Al-Ni could be enhanced by introducing both NA and PC energetic composites.Among which the Al/Ni@NA com-posite exhibited higher reactivity and improved combustion performance.The measured flame propa-gation rate(v=20.6 mm/s),average combustion wave temperature(Tmax=1567.0℃)and maximum temperature rise rate(γt=1633.6℃/s)of Al/Ni@NA are higher than that of the Al/Ni(v=15.8 mm/s,Tmax=858.0℃,and γt=143.5℃/s).The enhancement in combustion properties could be due to presence of the acidic gaseous products from ECs,which could etch the Al2O3 shell on the surface of Al particles,and make the inner active Al to be easier transported,so that an intimate and faster inter-metallic reaction between Al and Ni would be realized.Furthermore,the morphologies and chemical compositions of the condensed combustion products(CCPs)of Al-Ni@ECs composites were found to be different depending on the types of ECs.The compositions of CCPs are dominated with the Al-Ni in-termetallics,combining with a trace amount of Al5O6N and Al2O3.
文献关键词：
中图分类号：
作者姓名：
Su-lan Yang;Ke-juan Meng;Wu-xi Xie;Hong-qi Nie;Qi-Long Yan
作者机构：
Science and Technology on Combustion,Internal Flow and Thermo-Structure Laboratory,Northwestern Polytechnical University,Xi'an,710072,China;Xi'an Modern Chemistry Research Institute,Xi'an,710065,China
文献出处：
引用格式：
[1]Su-lan Yang;Ke-juan Meng;Wu-xi Xie;Hong-qi Nie;Qi-Long Yan-.Tuning the reactivity of Al-Ni by fine coating of halogen-containing energetic composites)[J].防务技术,2022(10):1810-1821
A类：
hexanitrohexaazaisowurtziitane,CCPs,termetallics,Al5O6N
B类：
Tuning,reactivity,by,fine,coating,halogen,containing,energetic,composites,In,this,paper,various,core,shell,structured,ECs,have,been,prepared,spray,drying,technique,involved,refer,ammonium,perchlorate,cellulose,AP,NC,NA,polyvinylidene,fluoride,PVDF,CL,Two,mixtures,were,atomic,ratios,named,3Ni,respec,tively,thermal,combustion,behaviors,compre,hensively,investigated,Results,showed,that,performance,could,enhanced,introducing,both,Among,which,exhibited,higher,improved,measured,flame,propa,gation,average,wave,temperature,Tmax,maximum,rise,than,enhancement,properties,due,presence,acidic,gaseous,products,from,etch,Al2O3,surface,particles,make,inner,active,easier,transported,intimate,faster,inter,reaction,between,would,realized,Furthermore,morphologies,chemical,compositions,condensed,found,different,depending,types,dominated,combining,trace,amount
AB值：
0.504653
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