摘要
为提高含纳米Al固体推进剂和PBX炸药的安全性,利用DSC、SEM、机械感度、火焰感度等测试方法,探讨了混合方法、混合比例、包覆改性等因素对纳米Al/RDX混合物安全性能的影响。结果表明,与筛分混合法相比,通过溶液法混合,纳米Al能均匀分散于RDX表面,使纳米Al/RDX的热分解活化能和热爆炸临界温度分别增加8.7%和4.5%,热安定性也提高;随着纳米Al含量的增加,纳米Al/RDX混合物的摩擦感度和撞击感度均减小,而溶液混合法所得样品的撞击感度明显高于筛混法;采用氟橡胶、炭黑B包覆纳米Al后混合物的撞击感度降低到包覆前的18.4%。
To improve the safety of solid propellants and PBX explosives with nano-aluminum,the effects of mixing methods,mixing ratio and coating modification on the safety performance of mixtures were studied by DSC,SEM,mechanical sensitivity and flame sensitivity etc test methods.Results show that compared to sieve mixing method,through mixing the solution,nano-Al powder can be uniformly dispersed on the surface of RDX powder,making the activation energy of thermal decomposition and critical temperature of thermal explosion of nano-Al/RDX increase by8.7% and 4.5%,respectively,and the thermal stability is also improved.With the increase of nano-Al content in mixtures,the friction sensitivity and impact sensitivity of nano-Al/RDX mixture decrease,but the impact sensitivity of solution mixed samples is significantly higher than that of sieve mixing method.Coated by fluorine rubber or a kind of carbon black B,the impact sensitivity of mixtures can significantly reduce to 18.4% of that before being coated.
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2015年第5期69-73,78,共6页
Chinese Journal of Explosives & Propellants
基金
火炸药专项资助项目(No.004010201)
关键词
材料科学
纳米AL
RDX
安全性
热爆炸临界温度
机械感度
包覆
material science
nano-aluminum
RDX
security
critical temperature of thermal explosion
mechanical sensitivity
coating
