THV基活性材料力学性能与点火反应特性

doi:10.12382/bgxb.2021.0684

摘要/Abstract

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:

聂政元，肖建光，王岩鑫，谢志渊. THV基活性材料力学性能与点火反应特性[J]. 兵工学报, 2022, 43(12): 3030-3039.

NIE Zhengyuan， XIAO Jianguang， WANG Yanxin， XIE Zhiyuan. Mechanical Properties and Ignitionand Reaction Characteristics of THV-based Reactive Materials[J]. Acta Armamentarii, 2022, 43(12): 3030-3039.

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