含能材料2017，Vol.25Issue(9)：706-711,6.DOI:10.11943/j.issn.1006-9941.2017.09.001
RDX粒度对硝胺发射药力学性能及燃烧性能的影响
Effect of RDX Particle Size on the Mechanical and Combustion Properties of Nitramine Gun Propellant
摘要
Abstract
To study the effect of RDX particle size on the mechanical property and combustion performance of nitramine gun propellant,three kinds of nitramine gun propellants containing 25.0％ RDX with average particle sizes of 30,50 μm and 150 μm were designed,their impact strength,crushing situation and combustion performance were studied by pendulum charpy impact machine,drop weight test apparatus and closed bomb,respectively.Results show that with the particle size of RDX decreasing from 150 μm to 30 μm,the impact strength of gun propellants at low temperature (-40 C) increases from 3.46 J · cm-2 to 8.99 J · cm-2,and the crushing degree under the action of drop hammer impact (hammer weight 5kg and drop height 80 cm) decreases from 96％ to 18％.When the average particle size of RDX,Ds0,is 30,50 μm and 150 μm,the pressure exponent of burning rate is 0.985,0.996 and 1.063,respectively.When the particle size of RDX is 30 μm or 50 μm,the u-p curve of gun propellant is smooth,its combustion is stable.When the particle size of RDX is 150 μm,in the pressure range of 100 ～150 MPa to 150 MPa ～Pdpm,the pressure exponent of burning rate decreases from 1.125 to 0.612,revealing that there is a mutation in the pressure exponent of burning rate and the propellant combustion is unstable.关键词
硝胺发射药/黑索今(RDX)/粒度/力学性能/燃烧性能Key words
nitramine gun propellants/hexogen(RDX)/particle size/mechanical property/combustion performance分类
军事科技引用本文复制引用
杨建兴,杨伟涛,马方生,许灿啓,贾永杰,杨丽侠..RDX粒度对硝胺发射药力学性能及燃烧性能的影响[J].含能材料,2017,25(9):706-711,6.基金项目
总装燃烧与爆炸技术重点实验室基金(9140C350207130C35123) （9140C350207130C35123）
