Defence Technology(防务技术)最新文献_第8页

Thermochemical characteristics of Ce95Al5 material and perforation behavior of its liner on steel targets Ce95Al5材料的热化学特性及其衬板在钢靶上的穿孔行为

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.05.017

Liang Mao , Peiying Li , Guitao Liu , Xiongbo Feng , Yitong Liu , Zirui Jiang , Chunlan Jiang , Baolin Wang

Cerium-aluminum (CeAl) alloy is promising reactive structural materials (RSMs) with significant potential for liner applications. To investigate the thermochemical characteristics of CeAl alloy and the perforation behavior of its liner impacting steel targets, a CeAl alloy liner with 5 wt% Al content was fabricated, with a cerium (Ce) liner and a copper (Cu) liner used as control. The microstructure and elemental distribution of the CeAl alloy were analyzed using SEM, EDS, and XRD. The thermochemical reaction mechanism of the CeAl alloy was examined through TG-DSC. Penetration experiments were conducted to explore the combined effects of invasion and implosion of CeAl alloy liner against steel target. The results indicate that the addition of Al leads to the formation of Ce₃Al intermetallic compounds in the alloy and reduces the apparent activation energy of the Ce-based alloy by around 53.17%, thereby facilitating energy release. The presence of 5 wt% Al increases the calorific value by approximately 24.5%, and this change allows the oxidation process to be divided into three distinct stages. Compared to an inert copper liner, the average penetration diameter of the CeAl₅ reactive alloy liner increases by around 42.78%. Furthermore, when compared to the Ce liner, the penetration depth of the CeAl₅ reactive alloy liner increases by approximately 82.64%.

铈铝（CeAl）合金是一种很有前途的反应结构材料，在衬垫领域具有很大的应用潜力。为了研究CeAl合金的热化学特性及其衬垫冲击钢靶的穿孔行为，制备了Al含量为5wt %的CeAl合金衬垫，以铈（Ce）衬垫和铜（Cu）衬垫为对照。采用扫描电镜（SEM）、能谱仪（EDS）和x射线衍射仪（XRD）分析了CeAl合金的微观组织和元素分布。采用TG-DSC对CeAl合金的热化学反应机理进行了研究。通过侵彻实验，探讨了CeAl合金衬垫对钢靶的侵彻和内爆联合作用。结果表明：Al的加入导致合金中Ce3Al金属间化合物的形成，使ce基合金的表观活化能降低约53.17%，有利于能量的释放；5 wt% Al的存在使热值增加约24.5%，这种变化使氧化过程分为三个不同的阶段。与惰性铜衬垫相比，CeAl5活性合金衬垫的平均穿透直径增加了约42.78%。此外，与Ce衬垫相比，CeAl5反应合金衬垫的渗透深度提高了约82.64%。

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引用次数: 0

Energetic composites based on aluminium alloy fuels (Al-Ti and Al-Mg) with polyvinylidene fluoride (PVDF): An in-depth study of the fabrication, structure, combustion properties and reaction kinetics 基于铝合金燃料（Al-Ti和Al-Mg）和聚偏氟乙烯（PVDF）的高能复合材料：对其制备、结构、燃烧性能和反应动力学进行了深入研究

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.07.017

Zhanjun Yang , Hao Liu , Mi Li , Xiaoqian Wang , Yang Li , Zhongxuan Han , Ajay V. Singh , Lin Jiang , Andrei Rotaru

This study investigates the combustion characteristics of reactive aluminium alloys in combination with fluoropolymer oxidizers. Aluminium-magnesium (Al-Mg) and aluminium-titanium (Al-Ti) alloys were selected as metallic fuels, while polyvinylidene fluoride (PVDF) was employed as the oxidizer. Composite samples were prepared using two methods: electrostatic spraying (ES) and physical mixing (PM). The ES method yielded samples with a PVDF-coated structure, whereas the PM method produced simple mixtures. The samples and their combustion products were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), combustion experiments, and thermal analysis. The results indicate that compared to the PM samples, the ES-coated samples exhibited more effective dispersion of metallic particles, reduced particle agglomeration, increased combustion heat release temperature, decreased maximum flame area and height, and mitigated or eliminated explosive or micro-explosive phenomena during combustion, thereby achieving stable combustion. Additionally, the ES samples demonstrated a significant reduction in the particle size of condensed-phase products after combustion, alleviated sintering and agglomeration, decreased the formation of metal oxides, and minimized residual metallic fuel, allowing for the full release of combustion heat. Thermal analysis revealed that the coating structure of the ES samples lowered the activation energy for the reaction between the metallic fuel and PVDF, thereby enhancing the chemical reactivity.

研究了活性铝合金与含氟聚合物氧化剂复合时的燃烧特性。选择铝镁（Al-Mg）和铝钛（Al-Ti）合金作为金属燃料，聚偏氟乙烯（PVDF）作为氧化剂。采用静电喷涂（ES）和物理混合（PM）两种方法制备复合样品。ES方法得到的样品具有pvdf涂层结构，而PM方法产生的样品是简单的混合物。利用扫描电镜（SEM）、x射线衍射（XRD）、燃烧实验和热分析对样品及其燃烧产物进行了表征。结果表明：与PM样品相比，es包覆样品金属颗粒的分散更有效，颗粒团聚减少，燃烧放热温度升高，最大火焰面积和火焰高度降低，燃烧过程中爆炸或微爆炸现象减轻或消除，从而实现稳定燃烧。此外，ES样品显示燃烧后冷凝相产物的粒径显著减小，减轻了烧结和团聚，减少了金属氧化物的形成，最小化了残余金属燃料，使燃烧热充分释放。热分析表明，ES样品的涂层结构降低了金属燃料与PVDF反应的活化能，从而提高了化学反应活性。

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引用次数: 0

Stress waves in concrete targets induced by hypervelocity projectile penetration: an experimental and numerical investigation 超高速弹丸侵彻混凝土靶的应力波：实验与数值研究

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.07.004

Shangbin Yang , Xiangzhen Kong , Qin Fang , Yong Peng

With the application of hypervelocity weapons in warfare, comprehensively evaluating their destructive effects is of particular interest for protective engineering. Existing studies mostly focused on the depth of penetration by hypervelocity projectile, while investigation on stress waves associated with hypervelocity penetration was very limited. To clarify the generation and propagation of stress waves in concrete targets induced by hypervelocity projectile penetration, in the present study, six spherical projectile penetration tests on concrete targets were firstly conducted with projectile velocity ranged from 1875 m/s to 3940 m/s, in which the stress waves were carefully measured by the PVDF transducers. Then corresponding numerical models were developed and validated, and based on the validated numerical model the mechanisms of generation and propagation of stress waves were clarified. It was found that the stress waves observed during hypervelocity penetration are generated by the continuous interactions of projectile and target during penetration, and have unique characteristics such as the directionality and the "two peaks" phenomenon when compared with the stress waves generated by charge explosion. Finally, the effects of projectile velocity, projectile material, and target strength on the stress waves below the penetration depth were numerically investigated, and two important indexes for evaluating the stress waves by hypervelocity penetration were proposed.

随着超高速武器在战争中的应用，对其破坏效果进行综合评估是防护工程的一个重要课题。现有的研究主要集中在超高速弹丸侵彻深度上，而对超高速侵彻过程中应力波的研究非常有限。为了阐明超高速弹丸侵彻混凝土靶体中应力波的产生和传播规律，本研究首先对混凝土靶体进行了6次球面弹丸侵彻试验，弹丸速度范围为1875 ~ 3940 m/s，并利用PVDF传感器对应力波进行了详细测量。建立并验证了相应的数值模型，在此基础上阐明了应力波的产生和传播机理。研究发现，超高速侵彻过程中观测到的应力波是由侵彻过程中弹与靶的连续相互作用产生的，与装药爆炸产生的应力波相比，具有方向性和“双峰”现象等独特特征。最后，对弹丸速度、弹丸材料和靶材强度对侵彻深度以下应力波的影响进行了数值研究，并提出了评价超高速侵彻应力波的两个重要指标。

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引用次数: 0

A position distribution measurement method and mathematical modeling of two projectiles simultaneous hitting target based on three photoelectric encoder detection screens 基于三光电编码器检测屏的两弹同时命中目标位置分布测量方法及数学建模

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.07.013

Hanshan Li, Zixuan Cao, Xiaoqian Zhang

To solve the problem of identification and measurement of two projectiles hitting the target at the same time, this paper proposes a projectile coordinate test method combining three photoelectric encoder detection screens, and establishes a coordinate calculation model for two projectiles to reach the same detection screen at the same time. The design method of three photoelectric encoder detection screens and the position coordinate recognition algorithm of the blocked array photoelectric detector when projectile passing through the photoelectric encoder detection screen are studied. Using the screen projection method, the intersected linear equation of the projectile and the line laser with the main detection screen as the core coordinate plane is established, and the projectile coordinate data set formed by any two photoelectric encoder detection screens is constructed. The principle of minimum error of coordinate data set is used to determine the coordinates of two projectiles hitting the target at the same time. The rationality and feasibility of the proposed test method are verified by experiments and comparative tests.

为解决两枚弹丸同时命中目标的识别与测量问题，本文提出了一种结合三个光电编码器探测屏的弹丸坐标测试方法，并建立了两枚弹丸同时到达同一探测屏的坐标计算模型。研究了三种光电编码器检测屏的设计方法，以及弹丸通过光电编码器检测屏时阻塞阵光电探测器的位置坐标识别算法。采用屏幕投影法，建立以主检测屏为核心坐标平面的弹丸与直线激光器的相交线性方程，构造任意两个光电编码器检测屏形成的弹丸坐标数据集。利用坐标数据集误差最小原则确定两弹同时命中目标的坐标。通过实验和对比试验，验证了所提测试方法的合理性和可行性。

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引用次数: 0

Enhanced XGBoost algorithm with multi-objective optimization for blast-induced response forecasting of RC slabs 基于多目标优化的增强XGBoost算法的混凝土楼板爆破响应预测

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.07.012

Meng Liu , Xuke Lan , Chenxi Bian , Zhiyu Ma , Shuai Ma , Guangyan Huang

Amid increasingly frequent military conflicts and explosion events, accurately predicting the dynamic response of reinforced concrete (RC) slabs, key load-bearing components in building structures, is essential for understanding blast-induced damage and enhancing structural protection. However, current approaches predominantly rely on experimental tests, finite element (FE) simulations, and conventional machine learning (ML) techniques, which are often costly, inefficient, narrowly applicable, and insufficiently accurate. To overcome these challenges, this study aims to optimize ML models, refine architectural designs, and improve model interpretability. A comprehensive dataset comprising 489 samples was constructed by integrating experimental and simulation data from existing literature, incorporating 15 input features and one target variable. Based on this dataset, a novel method, termed MOPSO-TXGBoost, was proposed. Building on XGBoost as a baseline, the method employs multi-objective particle swarm optimization (MOPSO) for hyperparameter tuning, introduces a tri-stream stacking architecture to enhance feature representation, and trains three distinct models to improve generalization performance. A weighted fusion strategy is employed to further enhance the accuracy of prediction. Additionally, a model comprehensive evaluation (MCE) index is introduced, which integrates error metrics and fitting performance to facilitate systematic model assessment. Experimental results indicate that, compared with the baseline XGBoost model, the proposed approach reduces prediction error by 61.4% and increases the coefficient of determination (R²) by 0.217. Moreover, it outperforms several mainstream machine learning (ML) algorithms. The findings of this study advance ML-based blast damage prediction and provide theoretical support for safety assessment and protection optimization of RC slab structures.

在日益频繁的军事冲突和爆炸事件中，准确预测建筑结构关键承重构件钢筋混凝土板的动力响应，对于认识爆炸损伤和加强结构防护至关重要。然而，目前的方法主要依赖于实验测试、有限元（FE）模拟和传统的机器学习（ML）技术，这些技术通常成本高、效率低、适用范围窄，而且不够准确。为了克服这些挑战，本研究旨在优化机器学习模型，改进架构设计，并提高模型的可解释性。通过整合已有文献的实验和仿真数据，构建了包含489个样本的综合数据集，其中包含15个输入特征和1个目标变量。在此基础上，提出了一种新的方法MOPSO-TXGBoost。该方法以XGBoost为基准，采用多目标粒子群优化（MOPSO）进行超参数调优，引入三流叠加架构增强特征表示，并训练三个不同的模型来提高泛化性能。采用加权融合策略进一步提高预测精度。此外，还引入了模型综合评价指标（MCE），该指标综合了误差指标和拟合性能，便于对模型进行系统评价。实验结果表明，与基线XGBoost模型相比，该方法的预测误差降低了61.4%，决定系数（R2）提高了0.217。此外，它优于几种主流机器学习（ML）算法。研究结果进一步推进了基于ml的爆炸损伤预测，为钢筋混凝土板结构的安全评价和防护优化提供了理论支持。

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引用次数: 0

Damage assessment and fragility curve development for vehicle tires using shock tube experiments 基于激波管试验的汽车轮胎损伤评估及易损性曲线的建立

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.06.021

Sung-Jun Park , In-Gul Kim , Jae-Sang Park

This study presents a fragility curve to assess explosively induced damage to military vehicle tires based on shock tube experiments. To replicate lateral damage scenarios that may occur in real battlefield environments involving missile or bomb detonations, extreme overpressure conditions were generated using a shock tube. The influence of explosive charge mass on tire damage was quantitatively evaluated. Experimental results identified two critical failure thresholds: for loss of pressure, the threshold was 354 kPa peak overpressure and 3052 kPa·ms impulse; for rupture, the values were 485 kPa and 4237 kPa·ms, respectively. The same damage profile was reproduced through finite element analysis (FEA), verifying the reliability of the simulation. A Single Degree of Freedom (SDOF) model and Kingery–Bulmash (K–B) chart were employed to generate pressure–impulse data as a function of stand-off distance. These data were applied to a finite element tire model using the BLAST ENHANCED keyword in LS-DYNA. The applied peak overpressures were identical to the experimental values with a 24%–27% difference in impulse. The simulation also captured recurring bead rim separation phenomenon, leading to internal pressure loss consistent with high-speed camera observations from the experiments. The resulting fragility curve clearly defines the threshold conditions for tire damage and provides a standardized damage assessment model applicable to various explosive charge masses and stand-off distances. The proposed model offers a quantitative basis for evaluating tire vulnerability, providing foundational reference data for defense applications. Specifically, the findings are expected to serve as a reliable source for weapon effects analysis and target vulnerability assessments involving wheeled military vehicles.

提出了一种基于激波管试验的军用车辆轮胎易损性曲线。为了模拟导弹或炸弹爆炸等真实战场环境中可能发生的侧向损伤场景，使用激波管产生了极端超压条件。定量评价了炸药装药质量对轮胎损伤的影响。实验结果确定了两个临界失效阈值：压力损失阈值为峰值超压354 kPa和脉冲3052 kPa·ms；破裂值分别为485 kPa和4237 kPa·ms。通过有限元分析（FEA）再现了相同的损伤轮廓，验证了模拟的可靠性。采用单自由度（SDOF）模型和kingry - bulmash （K-B）图生成压力-冲量数据，并将其作为隔离距离的函数。利用LS-DYNA中的BLAST ENHANCED关键字将这些数据应用于轮胎有限元模型。应用的峰值超压与实验值相同，脉冲相差24%-27%。模拟还捕获了反复出现的气泡边缘分离现象，导致内部压力损失，这与实验中的高速相机观察结果一致。得到的易损性曲线明确了轮胎损伤的阈值条件，提供了适用于不同装药质量和离爆距离的标准化损伤评估模型。该模型为轮胎易损性评价提供了定量依据，为防御应用提供了基础参考数据。具体而言，这些研究结果预计将成为武器效果分析和涉及轮式军用车辆的目标脆弱性评估的可靠来源。

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引用次数: 0

Distributed adaptive coalition task allocation based on reachable region online prediction for munition swarm 基于弹药群可达区域在线预测的分布式自适应联盟任务分配

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.07.005

Yuze Zhou , Teng Long , Jingliang Sun , Junzhi Li , Jianxin Zhong

Task allocation for munition swarms is constrained by reachable region limitations and real-time requirements. This paper proposes a reachable region guided distributed coalition formation game (RRG-DCF) method to address these issues. To enable efficient online task allocation, a reachable region prediction strategy based on fully connected neural networks (FCNNs) is developed. This strategy integrates high-fidelity data generated from the golden section method and low-fidelity data from geometric approximation in an optimal mixing ratio to form multi-fidelity samples, significantly enhancing prediction accuracy and efficiency under limited high-fidelity samples. These predictions are then incorporated into the coalition formation game framework. A tabu search mechanism guided by the reachable region center directs munitions to execute tasks within their respective reachable regions, mitigating redundant operations on ineffective coalition structures. Furthermore, an adaptive guidance coalition formation strategy optimizes allocation plans by leveraging the hit probabilities of munitions, replacing traditional random coalition formation methods. Simulation results demonstrate that RRG-DCF surpasses the contract network protocol and traditional coalition formation game algorithms in optimality and computational efficiency. Hardware experiments further validate the method's practicality in dynamic scenarios.

弹药群的任务分配受到可达区域限制和实时性要求的约束。针对这些问题，本文提出了一种可达区域引导的分布式联盟形成博弈方法（RRG-DCF）。为了实现高效的在线任务分配，提出了一种基于全连接神经网络（fcnn）的可达区域预测策略。该策略将黄金分割法生成的高保真数据与几何近似生成的低保真数据以最优混合比例融合，形成多保真样本，在高保真样本有限的情况下，显著提高预测精度和效率。然后将这些预测纳入联盟形成博弈框架。可达区域中心引导的禁忌搜索机制引导弹药在各自可达区域内执行任务，减少无效联盟结构上的冗余操作。此外，自适应制导编队策略通过利用弹药命中概率优化分配方案，取代传统的随机编队方法。仿真结果表明，RRG-DCF算法在最优性和计算效率方面优于契约网络协议和传统的联盟形成博弈算法。硬件实验进一步验证了该方法在动态场景下的实用性。

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引用次数: 0

Investigation of penetration characteristics of shaped charge jet impacting behind-armor liquid-filled containers 聚能射流冲击装甲后充液容器侵彻特性研究

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.07.001

Shixin Ma, Yuchi Tang, Lanwei Zhou, Xiangdong Li

The impact of high-velocity penetrators into liquid-filled containers can generate hydrodynamic ram effects, potentially causing catastrophic structural damage to the container. Previous studies have primarily focused on undeformed penetrators, such as fragments or bullets, with limited attention directed toward shaped charge jets. This study investigates the penetration characteristics of shaped charge jets impacting behind-armor liquid-filled containers, with particular emphasis on jet–liquid interactions. A theoretical penetration model incorporating material compressibility and jet stretching was developed based on the virtual origin theory. A high-speed imaging experimental system was designed to capture the jet motion within the container. The impact process was numerically reproduced using ANSYS/LS-DYNA, and the effects of standoff and overmatch on jet penetration were analyzed. The results reveal that jet stretching induced by increased standoff enhances the penetration velocity of the jet. A proportional relationship between the stretching factor (λ) and the overmatch parameter (I) was identified, with λ ranging from approximately 1.22 to 1.38 times I across the studied standoff range (80–220 mm). The findings offer a basis for future studies on the pressure distribution in the liquid and the structural response of containers.

高速穿孔弹对充满液体的容器的冲击会产生水动力冲击效应，可能会对容器造成灾难性的结构破坏。以前的研究主要集中在未变形的穿甲弹上，如破片或子弹，对聚能射流的关注有限。本文研究了聚能射流冲击装甲后充液容器的侵彻特性，重点研究了射流与液体的相互作用。基于虚原点理论，建立了包含材料可压缩性和射流拉伸的理论侵彻模型。设计了一套高速成像实验系统来捕捉容器内的射流运动。利用ANSYS/LS-DYNA软件对冲击过程进行数值模拟，分析了超前和超前对射流侵润的影响。结果表明，射流的拉伸作用使射流的侵彻速度增大。确定了拉伸因子（λ）和超匹配参数(I)之间的比例关系，在研究的距离范围（80-220 mm）内，λ的范围约为1.22至1.38倍I。研究结果为进一步研究液体压力分布和容器结构响应提供了基础。

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引用次数: 0

A practical formula for penetration depth of rigid projectiles into rock and concrete considering the non-scaling effect 考虑非结垢效应的刚性弹丸侵彻岩石和混凝土的实用公式

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.03.001

Xiaohan Zhang , Tianhan Xu , Zhen Wang

The non-scaling effect on the penetration depth of rigid projectiles is an important issue that must be considered when extending the results of scaled experiments to prototype scenes. In this study, the evolution of the stress and strain of the target under penetration was analyzed. Expressions for the penetration resistance and penetration depth were obtained based on the conservation equation and continuity condition of the target. The penetration coefficients that characterize the nose shape, target resistance, and non-scaling effect were defined. Simplified calculation methods for the coefficients within the range of rigid projectile penetration were developed. Two methods for estimating the target parameters are proposed. The results show that the non-scaling effect is related to the failure process of the target and depends on the ratio of cavity radius to comminuted region radius. The nose shape coefficient can be approximated as a linear function of the length-to-diameter ratio of the nose. The nose-shape coefficient of a flat-nosed projectile is 0.57. The caliber coefficient is related to the projectile diameter and reflects the non-scaling effect, which increases with the projectile diameter. A practical formula for calculating the penetration depth of rigid projectiles considering the non-scaling effect is also proposed. This formula is in good agreement with penetration experiments on rock and concrete.

刚性弹丸侵深的非标度效应是将标度实验结果推广到原型场景时必须考虑的一个重要问题。本研究分析了靶材在侵彻作用下的应力应变演变过程。根据目标的守恒方程和连续条件，得到了侵彻阻力和侵彻深度的表达式。定义了表征机头形状、目标阻力和非结垢效应的侵彻系数。提出了刚性弹丸侵彻范围内系数的简化计算方法。提出了两种估计目标参数的方法。结果表明，非标度效应与靶体的破坏过程有关，取决于空腔半径与粉碎区半径的比值。鼻子形状系数可以近似为鼻子长径比的线性函数。扁头弹的弹头形系数为0.57。口径系数与弹丸直径有关，反映了非标度效应，随弹丸直径增大而增大。提出了考虑非标度效应的刚性弹丸侵彻深度的实用计算公式。该公式与岩石和混凝土的侵彻试验结果吻合较好。

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引用次数: 0

Bridging Al-PTFE enhances energy output and mechanical properties of LLM-105 桥接Al-PTFE增强了LLM-105的能量输出和力学性能

IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术)

Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.06.026

Wei Huang , Yaofeng Mao , Sijia Yu , Longjie Huang , Jie Chen , Cui Nie , Xingquan Zhang , Fude Nie , Jun Wang

The energy release of energetic composites is severely limited by the inert alumina (Al₂O₃) layer on the surface of aluminum (Al). Polytetrafluoroethylene (PTFE) could eliminate Al₂O₃ layer due to its highly electronegativity and oxidability of fluorine. However, adding PTFE particles would weaken interfacial interactions resulted in poor mechanical properties and interfacial exothermic reaction. Herein, a bridging Al-PTFE as fuel and interfacial reinforcing agent was added and used to prepare LLM-105/Al-PTFE microspheres, achieving both high energy output and excellent mechanical properties. The energy release and combustion reaction performance of LLM-105/Al-PTFE microspheres are significantly improved due to high reaction heat and increased interfacial reaction area of Al-PTFE. The maximum pressure and pressurization rate of LLM-105/Al-PTFE microspheres are 164.06 kPa and 29.88 kPa/s, respectively, which are 40.11% and 16.67% higher than those of physical mixed samples. Furthermore, the tensile strength and compressive strength of LLM-105/Al-PTFE microspheres are 100.40% and 26.47% higher than those of LLM-105/Al. This work provides a new approach to improve the energy release and mechanical properties for energetic composites.

含能复合材料的能量释放受到铝表面惰性氧化铝（Al2O3）层的严重限制。聚四氟乙烯（PTFE）具有很强的电负性和氟的氧化性，可以消除Al2O3层。然而，聚四氟乙烯颗粒的加入会削弱界面相互作用，导致材料的力学性能和界面放热反应变差。在此基础上，以桥接Al-PTFE为燃料和界面增强剂，制备了LLM-105/Al-PTFE微球，获得了高能量输出和优异的力学性能。LLM-105/Al-PTFE微球的高反应热和界面反应面积的增加，显著提高了其能量释放和燃烧反应性能。LLM-105/Al-PTFE微球的最大加压压力和加压速率分别为164.06 kPa和29.88 kPa/s，分别比物理混合样品高40.11%和16.67%。与LLM-105/Al相比，LLM-105/Al- ptfe微球的抗拉强度和抗压强度分别提高了100.40%和26.47%。本工作为改善含能复合材料的能量释放和力学性能提供了新的途径。

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引用次数: 0