摘要
为研究铪/四氟乙烯-六氟丙烯-偏氟乙烯共聚物(Hf/THV)活性材料的力学性能与点火反应特性,采用溶剂蒸发-热压烧结法制备不同配比的Hf/THV试件,并开展准静态压缩试验与基于分离式霍普金森压杆的动态加载试验。研究结果表明:Hf/THV在动态加载下发生瞬间断裂,导致断裂处温度急剧升高形成热点、引发点火反应;THV的应变软化影响Hf/THV的力学性能和失效模式,进而影响材料的点火反应;质量含量62%Hf的Hf/THV试件由于明显的应变软化而表现出较强的塑性变形能力,动态加载持续较长时间后才有极少部分发生断裂,导致反应延迟时间较长且非常微弱;质量含量88%Hf的Hf/THV试件强度较高且脆性较强,动态加载持续较短时间内便能发生大范围断裂,导致反应延迟时间短且比较剧烈,但氧化剂THV的减少导致反应不充分。
In order to study the mechanical properties and ignition and reaction characteristics of the hafnium/tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer(Hf/THV)reactive material,specimens with different Hf/THV ratios were prepared by solvent evaporation-hot pressing sintering,and quasi-static compression test and dynamic loading test based on the Split-Hopkinson pressure bar(SHPB)were carried out.The results showed that:Hf/THV broke instantaneously under dynamic loading,which led to the sharp rise of the temperature at the fracture,triggering the formation of hot spots and ignition reaction;the strain softening of THV affected the mechanical properties and failure mode of Hf/THV,and then affected the ignition and reaction of the material;the Hf/THV specimen containing 62wt%Hf showed strong plastic deformation ability due to obvious strain softening,and only after the dynamic loading lasted for a long time did a small part of the specimen fractured,resulting in a long reaction delay time and weak reaction;the Hf/THV specimen containing 88wt%Hf had high strength and strong brittleness,and large-scale fracture occurred in a short time under dynamic loading,resulting in short reaction delay time and violent reaction,but the reduction of oxidant THV led to insufficient reaction.
作者
聂政元
肖建光
王岩鑫
谢志渊
NIE Zhengyuan;XIAO Jianguang;WANG Yanxin;XIE Zhiyuan(College of Mechatronic Engineering,North University of China,Taiyuan 030051,Shanxi,China;Science and Technology on Transient Impact Laboratory,No.208 Research Institute of China Ordnance Industries,Beijing 102202,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2022年第12期3030-3039,共10页
Acta Armamentarii
基金
国家自然科学基金项目(11702256)
山西省自然科学基金项目(20210302124214)
山西省高等学校科技创新项目(201802071)。
关键词
Hf/THV
准静态压缩
分离式霍普金森压杆
力学性能
点火反应特性
Hf/THV
Quasi-static compression
Split-Hopkinson pressure bar
Mechanical property
Ignition and reaction characteristics
