CHINESE JOURNAL OF ENERGETIC MATERIALS
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高燃烧热Ti/B/PTFE活性材料动态力学性能及释能特性
作者:
作者单位:

1.北京理工大学机电学院;2.北京理工大学材料学院

作者简介:

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基金项目:

国家自然科学基金资助(12272051)


Dynamic Mechanical Properties and Energy Release Characteristics of High Combustion Heat Ti/ B / PTFE Reactive Materials
Author:
Affiliation:

1.School of Mechatronics Engineering, Beijing Institute of Technology;2.School of Materials Science and Engineering, Beijing Institute of Technology

Fund Project:

Grant support: National Natural Science Foundation of China (No. 12272051)

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    摘要:

    为了研究Ti/B/PTFE活性材料的释能特性,设计制备了具有高释能效率的Ti/B/PTFE活性材料,开展了燃烧热测试,动态力学性能实验和弹道枪实验。采用氧弹量热仪和分离式霍普金森压杆(Split Hopkinson Pressure Bar)装置,获得了Ti/B/PTFE活性材料的燃烧热和动态力学性能。通过密闭罐体冲击释能实验,分析了PTFE含量以及环境气氛对Ti/B/PTFE活性材料释能特性的影响。根据密闭罐体压力曲线,计算了Ti/B/PTFE活性材料不同工况条件下的能量释放效率。研究结果表明,10%和15%PTFE含量的Ti/B/PTFE活性材料燃烧热分别为26.15 kJ·g-1和26.47 kJ·g-1,明显高于传统活性材料Al/PTFE的13.89 kJ·g-1。Ti/B/PTFE活性材料具有应变率效应,随着应变率的增加,10%PTFE试样屈服强度从28.3 MPa提高到34.2 MPa。而15%PTFE试样屈服强度从47.1 MPa提高到51.1 MPa。Ti/B/PTFE活性材料在密闭容器中冲击释能过程可分为材料破坏、热点形成、燃烧释能和泄压四个阶段。Ti/B/PTFE活性材料能量释放效率依赖于冲击速度,随着冲击速度增加,能量释放效率显著提高。由于活性元素与空气中氧气发生了氧化反应,相比惰性气氛条件,Ti/B/PTFE活性材料在空气环境下释能更为剧烈。研究显示,Ti/B/PTFE活性材料具备高释能特性,能量释放效率受冲击速度调控,在有氧环境中与氧气剧烈反应,可有效提升其毁伤能力。

    Abstract:

    Based on the high calorific value of the Ti/B binary system, this study designed and fabricated the Ti/B/PTFE reactive materials with high energy release efficiency. The materials exhibited practical application prospects in the industrial field. To investigate the energy release characteristics of the Ti/B/PTFE reactive materials, the study conducted combustion tests, dynamic mechanical property experiments and ballistic gun experiments. By employing the oxygen bomb calorimeter and the Split Hopkinson Pressure Bar (SHPB) apparatus, the combustion and dynamic mechanical properties of the Ti/B/PTFE reactive materials were obtained. The influences of PTFE content and ambient atmosphere on the energy release characteristics of Ti/B/PTFE reactive materials were analyzed through the confined vessel impact energy release experiments. The study further calculated the energy release efficiency of the Ti/B/PTFE reactive materials under different operating conditions based on the closed tank pressure curves. Results indicate the energy density of 63.3%Ti/26.7%B/10%PTFE reactive materials(26.15 kJ·g-1) and 60.6%Ti/24.4%B/15%PTFE reactive materials(26.47 kJ·g-1) is high than traditional reactive material Al/PTFE(13.89 kJ·g-1). Ti/B/PTFE reactive materials exhibit strain rate effect. With the increase of strain rate, the yield strength of the 10% PTFE specimen increases from 28.3 MPa to 34.2 MPa and that of the 15% PTFE specimen increases from 47.1 MPa to 51.1 MPa. The impact energy release process of Ti/B/PTFE reactive materials in confined vessel can be divided into four stages: material destruction, hot spot formation, combustion energy release and pressure relief. The reaction efficiency of Ti/B/PTFE reactive materials depends on the impact velocity. As the impact velocity increases, the reaction efficiency improves significantly. Compared with the inert atmosphere, the energy release of Ti/B/PTFE reactive materials is more intense in air. This is attributed to the oxidation reaction between reactive elements and oxygen in the air.

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彭喆,刘睿,陈鹏万.高燃烧热Ti/B/PTFE活性材料动态力学性能及释能特性[J].含能材料, 2025, 33(10):1165-1175. DOI:10.11943/CJEM2025148.
PENG Zhe, LIU Rui, CHEN Peng-wan. Dynamic Mechanical Properties and Energy Release Characteristics of High Combustion Heat Ti/ B / PTFE Reactive Materials[J]. Chinese Journal of Energetic Materials, 2025, 33(10):1165-1175. DOI:10.11943/CJEM2025148.

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  • 收稿日期: 2025-07-07
  • 最后修改日期: 2025-09-30
  • 录用日期: 2025-09-26
  • 在线发布日期: 2025-09-28
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