Detonation product analysis and the paradoxical performance mechanism of TKX-50:High detonation velocity with low metal acceleration  

作　　者：Kaiyuan Tan Yaqi Zhao Qin Liu Lixiao Hao Yushi Wen Chunliang Ji Sha Yang Haoxu Wang Luchuan Jia Jiahui Liu Zhuoping Duan Yong Han Fenglei Huang 

机构地区：[1]School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Institute of Chemical Materials,China Academy of Engineering Physics(CAEP),NO.64,Mianshan Road,Youxian,Mianyang 621900,China [3]Norinco Group Air Ammunition Research Institute Co.,Ltd,Harbin 150030,China

出　　处：《Defence Technology(防务技术)》2025年第4期255-266,共12页Defence Technology

基　　金：support provided by the National Natural Science Foundation of China(Grant No.12102405);the Presidential Foundation of CAEP(Grant No.YZJJZQ2023008).

摘　　要：This study investigates the paradoxical detonation behavior of TKX-50,a nitrogen-rich energetic material,exhibiting higher detonation velocities but lower metal acceleration ability compared to HMX.Through experimental measurements and theoretical calculations,we propose a novel three-factor competition mechanism to explain this phenomenon.TKX-50-based PBX formulations achieved detonation velocities up to 9100 m/s,surpassing HMX-based counterparts.However,cylinder expansion tests revealed a 15%reduction in metal acceleration ability.Thermochemical measurements showed lower detonation heat for TKX-50(4900 J/g)versus HMX(5645 J/g).Our mechanism involves:(1)compositional effects prevailing at high pressures;(2)Energy release becoming essential as pressure drops;(3)Pressure-dependent product composition evolution functioning at low pressure.VLW code calculations unveiled a"crossover"in Hugoniot curves,lending support to this mechanism.This study furnishes a new framework for comprehending the performance of nitrogen-rich energetic materials,with significant implications for the design and optimization of future high-energy density materials.

关 键 词：TKX-50 Nitrogen-rich explosives Detonation velocity Metal acceleration Detonation product 

分 类 号：TQ560.1[化学工程—炸药化工]