摘要
为了研究氢化镁(MgH_2)含量对铝(Al)/硼(B)混合体系点火性能的影响,以Al粉为基质,B粉为高能金属添加剂与金属氢化物MgH_2为活性金属添加剂,采用机械混合方式,制备了一种新型三元高能含氢金属燃料。采用1.2 L Hartmann管装置对Al、B、氢化镁(MgH_2)的最小点火能(MIE)进行了测试,并对不同MgH_2含量下的二元金属混合物(Al-MgH_2、B-MgH_2)以及对不同B和MgH_2含量下的三元金属混合物Al-B-MgH_2的MIE进行了对比研究。结果表明,Al、MgH_2的MIE较低,分别为80～100 mJ、5～10 mJ,B的MIE较高,大于1000 mJ;随着混合物中MgH_2含量由10%增加到30%,Al-MgH_2、B-MgH_2的MIE分别由50～70 mJ、大于1000 mJ,降低到10～20 mJ、480～500 mJ。随着三元混合物Al-B-MgH_2中B含量由25%减少到10%,其MIE也由700～800 mJ降到20～30 mJ,并且B含量一定时,MgH_2含量的增加,能明显地降低Al-B-MgH_2的MIE;B粉含量降低到10%时,Al-B-MgH_2混合金属粉的MIE保持在20～40 mJ范围内。
To study the effect of magnesium hydride（ MgH2） on the ignition performance of Al and B mixed system,a new high energy hydrogen-containing ternary metal fuel was prepared by mechanical mixing method using aluminum powder as matrix,boron powder as high energy metal additive,and magnesium hydride（ MgH2） as active metal additive The minimum ignition energy（ MIE） of Al,B and MgH2 was determined by a 1.2 L Hartmann tube apparatus and the MIE of binary metal mixtures（ Al-MgH2,B-MgH2） under the conditions of different MgH2 contents and ternary metal mixture Al-B-MgH2 under the conditions of different boron and MgH2 contents was compared and studied.Results show that the MIE of Al and MgH2 is lower,their values of MIE are 80-100 mJ,5-10 mJ,respectively,the MIE of B is higher,whose MIE is more than 1000 mJ. With the increase of MgH2 content in the mixture from 10% to 30%,the MIE of Al-MgH2 and B-MgH2 reduces from 50-70 mJ and more than 1000 mJ to 10-20 mJ and 480-500 mJ,respectively. With decreasing the boron content in the ternary mixture Al-B-MgH2 from 25% to 10%,whose MIE also reduces from 700-800 mJ to 20-30 mJ and when the boron content is certain value,the increase of MgH2 content can significantly decrease the MIE of Al-B-MgH2 metal mixture. When the content of boron powder is reduced to10%,the MIE of Al-B-MgH2 metal mixture powder can be maintained in the range of 20-40 mJ.
作者
赵金钢
李玉艳
刘大斌
徐森
潘峰
ZHAO Jin-gang;LI Yu-yan;LIU Da-bin;XU Sen;PAN Feng(School of Chemical Engineering Nanjing University of Science and Technology, Nanjing 210094,China;National Supervision and Inspection Center for Industrial Explosive Materials, Nanjing 210094, China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2018年第5期422-425,共4页
Chinese Journal of Energetic Materials
基金
国家自然科学基金项目(11572329)
国家自然科学基金青年项目(11602238
11702265)
