欢迎访问《兵工学报》官方网站,今天是 分享到:

兵工学报 ›› 2022, Vol. 43 ›› Issue (12): 3030-3039.doi: 10.12382/bgxb.2021.0684

• 论文 • 上一篇    下一篇

THV基活性材料力学性能与点火反应特性

聂政元1, 肖建光1,2, 王岩鑫1, 谢志渊1   

  1. (1.中北大学 机电工程学院, 山西 太原 030051; 2.中国兵器工业第208研究所 瞬态冲击技术国防科技重点实验室, 北京 102202)
  • 上线日期:2022-05-17
  • 作者简介:聂政元(1997—),男,硕士研究生。E-mail:291860060@qq.com
  • 基金资助:
    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)

Mechanical Properties and Ignitionand Reaction Characteristics of THV-based Reactive Materials

NIE Zhengyuan1, XIAO Jianguang1,2, WANG Yanxin1, XIE Zhiyuan1   

  1. (1.College of Mechatronic Engineering, North University of China, Taiyuan 030051, Shanxi, China;2.Science and Technology on Transient Impact Laboratory, No. 208 Research Institute of China Ordnance Industries, Beijing 102202, China)
  • Online:2022-05-17

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。

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

Abstract: 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.

Key words: Hf/THV, Quasi-staticcompression, Split-Hopkinsonpressurebar, Mechanicalproperty, Ignitionandreactioncharacteristics

中图分类号: