摘要
用自行研制确定火炸药热爆炸临界温度(Tcr)的试验装置测定了直径为10,15,20,30 mm和40 mm,长径比为1∶1的含高氯酸铵(AP)的PBX-A药柱的热爆炸临界温度。用Tcr测定和5 s爆发点试验装置测定了85℃老化70 d前后PBX-A的热爆炸临界温度和5 s爆发点。获得了PBX-A炸药在恒温热刺激下的响应程度,不同直径药柱的热爆炸临界温度,爆炸延滞期(t)与温度(T)的关系以及PBX-A炸药老化前后的热性能变化。结果表明,直径小于40 mm的无约束PBX-A炸药装药在恒温条件下仅发生燃烧。由拟合方程外推直径1 m长径比为1∶1的PBX-A炸药药柱的热爆炸临界温度大于120℃。lnt与1/T只在有限温度范围内呈线性关系。85℃老化70 d前后PBX-A炸药的热爆炸临界温度不变,5 s爆发点降低4.6℃。
The critical temperature of thermal explosion（Tcr） of PBX-A explosive chargers containing（AP） with diameter of 10,15,20,30 mm and 40 mm and ratio of length to diameter of 1：1 was measured by self-developed test device of determining the critical temperature of thermal explosion of explosives and propellants.The critical temperature of thermal explosion and 5 s explosion temperature of PBX-A before and after aging 70 days under 85 ℃ was measured by the T_c measurement and an explosion temperature test apparatus.The degree of responses to the constant temperature heat stimulus,critical temperature of thermal explosion of charge with different diameter,relationship between time to ignition（t） and temperature（T） and change of thermal performance of PBX-A explosive before and after aging was obtained.Results show that the combustion of unconstrained PBX-A explosive charger with diameter of less than 40 mm only occurs at a constant temperature.The value of T_（cr） extrapolated by the fitting equation is over 120 ℃ for PBX-A explosive charger with diameter of 1 m and ratio of length to diameter ratio of 1：1.The linear relationship between Int and 1/T can be true only in a very narrow temperature range.The Tcr of PBX-A explosive charger after aging 70 days under 85 ℃ does not change,however,its 5s explosion temperature decreases by 4.6 ℃.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2015年第7期693-696,共4页
Chinese Journal of Energetic Materials
关键词
浇铸PBX
热安全性
热爆炸临界温度
爆炸延滞期
casted polymer bonder（PBX） thermal safety critical temperature of thermal explosion time to ignition
