Defence Technology(防务技术)最新文献_第10页

Weapon-target assignment for unmanned aerial vehicles: A multi-strategy threshold public goods game approach 无人机武器目标分配：多策略阈值公共物品博弈方法

IF 5

Defence Technology(防务技术) Pub Date : 2025-01-25 DOI: 10.1016/j.dt.2025.01.014

Wenhao Bi , Zhaoxi Wang , Yang Xu , An Zhang

{"title":"Weapon-target assignment for unmanned aerial vehicles: A multi-strategy threshold public goods game approach","authors":"Wenhao Bi , Zhaoxi Wang , Yang Xu , An Zhang","doi":"10.1016/j.dt.2025.01.014","DOIUrl":"10.1016/j.dt.2025.01.014","url":null,"abstract":"<div><div>As a crucial process in the coordinated strikes of unmanned aerial vehicles (UAVs), weapon-target assignment is vital for optimizing the allocation of available weapons and effectively exploiting the capabilities of UAVs. Existing weapon-target assignment methods primarily focus on macro cluster constraints while neglecting individual strategy updates. This paper proposes a novel weapon-target assignment method for UAVs based on the multi-strategy threshold public goods game (PGG). By analyzing the concept mapping between weapon-target assignment for UAVs and multi-strategy threshold PGG, a weapon-target assignment model for UAVs based on the multi-strategy threshold PGG is established, which is adaptively complemented by the diverse cooperation-defection strategy library and the utility function based on the threshold mechanism. Additionally, a multi-chain Markov is formulated to quantitatively describe the stochastic evolutionary dynamics, whose evolutionary stable distribution is theoretically derived through the development of a strategy update rule based on preference-based aspiration dynamic. Numerical simulation results validate the feasibility and effectiveness of the proposed method, and the impacts of selection intensity, preference degree and threshold on the evolutionary stable distribution are analyzed. Comparative simulations show that the proposed method outperforms GWO, DE, and NSGA-II, achieving 17.18% higher expected utility than NSGA-II and reducing evolutionary stable times by 25% in large-scale scenario.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"48 ","pages":"Pages 221-237"},"PeriodicalIF":5.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact attenuation mechanism of single/double-layer potting structures of MEMS devices under continuous double-pulse impact MEMS器件单/双层灌封结构在连续双脉冲冲击下的冲击衰减机理

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Defence Technology(防务技术) Pub Date : 2025-01-25 DOI: 10.1016/j.dt.2025.01.009

Hao'nan Guo, Yunbo Shi, Rui Zhao, Yu'nan Chen, Peng Zhang, Liang Chen, Tao Guo

{"title":"Impact attenuation mechanism of single/double-layer potting structures of MEMS devices under continuous double-pulse impact","authors":"Hao'nan Guo, Yunbo Shi, Rui Zhao, Yu'nan Chen, Peng Zhang, Liang Chen, Tao Guo","doi":"10.1016/j.dt.2025.01.009","DOIUrl":"10.1016/j.dt.2025.01.009","url":null,"abstract":"<div><div>High-overload shocks are very likely to cause damage to the microstructure of MEMS devices, especially the continuous multiple high-overload shocks generated by the penetration of the multilayer target environment pose more stringent challenges to its protective structure. In this study, the kinetic response model of the protective structure under single-pulse and continuous double-pulse impact is established, and a continuous double-pulse high overload impact test impact platform based on the sleeve-type bullet is constructed, and the protective performance of the multi-layer structure under multi-pulse is analyzed based on the acceleration decay ratio, and the results show that the protective performance of the structure has a positive correlation with its thickness, and it is not sensitive to the change of the load of the first impact; the first impact under double-pulse impact will cause damage to the microstructure through the superposition of the second impact. The first impact under double-pulse impact will cause an increase in the overload amplitude of the second impact through superposition; compared with the single-layer structure, the acceleration attenuation ratio of the double-layer structure can be increased by up to 26.13%, among which the epoxy-polyurethane combination has the best protection performance, with an acceleration attenuation ratio of up to 44.68%. This work provides a robust theoretical foundation and experimental basis for the reliable operation of MEMS devices, as well as for the design of protective structures in extreme environments.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"48 ","pages":"Pages 104-114"},"PeriodicalIF":5.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic response of blast doors enhanced by enclosed-space TNT explosions: Experimental and numerical study 封闭空间TNT爆炸增强防爆门的动力响应：实验与数值研究

IF 5

Defence Technology(防务技术) Pub Date : 2025-01-23 DOI: 10.1016/j.dt.2025.01.012

Chenwei Wu , Guokai Zhang , Yong He , Liwang Liu , Ju Liu , Xiaoning Yang

{"title":"Dynamic response of blast doors enhanced by enclosed-space TNT explosions: Experimental and numerical study","authors":"Chenwei Wu , Guokai Zhang , Yong He , Liwang Liu , Ju Liu , Xiaoning Yang","doi":"10.1016/j.dt.2025.01.012","DOIUrl":"10.1016/j.dt.2025.01.012","url":null,"abstract":"<div><div>The afterburning of TNT and structural constraints in confined spaces significantly amplify the blast load, leading to severe structural damage. This study investigates the mechanisms underlying the enhanced dynamic response of reinforced concrete blast doors with four-sided restraints in confined space. Explosion tests with TNT charges ranging from 0.15 kg to 0.4 kg were conducted in a confined space, capturing overpressure loads and the dynamic response of the blast door. An internal explosion model incorporating the afterburning effect was developed using LS-DYNA software and validated against experimental data. The results reveal that the TNT afterburning effect amplifies both the initial peak overpressure and the quasi-static overpressure, resulting in increased deformation of the blast door. Within the 0.15–0.4 kg charge range, the initial overpressure peak and quasi-static overpressure increased by an average of 1.79 times and 2.21 times, respectively. Additionally, the afterburning effect enhanced the blast door's deflection by 177%. Compared to open-space scenarios, the cumulative deflection of the blast door due to repeated shock wave impacts is significantly greater in confined spaces. Furthermore, the quasi-static pressure arising from the structural constraints sustains the blast door's deflection at a high level.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"48 ","pages":"Pages 173-186"},"PeriodicalIF":5.0,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on the TNT equivalence for blast parameters in a confined space 密闭空间内TNT爆炸参数等效性的实验研究

IF 5

Defence Technology(防务技术) Pub Date : 2025-01-21 DOI: 10.1016/j.dt.2025.01.011

Yu-lei Zhang , Yan Liu , Pu Song , Hao-zhe Liang , Di Yang , Lu Han , Hai-yan Jiang , Kai Zhong

{"title":"Experimental study on the TNT equivalence for blast parameters in a confined space","authors":"Yu-lei Zhang , Yan Liu , Pu Song , Hao-zhe Liang , Di Yang , Lu Han , Hai-yan Jiang , Kai Zhong","doi":"10.1016/j.dt.2025.01.011","DOIUrl":"10.1016/j.dt.2025.01.011","url":null,"abstract":"<div><div>The concept of TNT (Trinitrotoluene, C<sub>7</sub>H<sub>5</sub>N<sub>3</sub>O<sub>6</sub>) equivalence is often invoked to evaluate the performance and predict the explosion parameters of different types of explosives. However, due to its low prediction accuracy and limited application range, the use of TNT equivalence for predicting explosion parameters in a confined space is rare. Compared with explosions in free fields, the process of explosive energy release in a confined space is closely related to various factors such as oxygen balance, combustible components content, and surrounding oxygen content. Studies have shown that in a confined space, negative oxygen balance explosives react with surrounding oxygen during afterburning, resulting in additional energy release and enhanced blast effects. The mechanism of energy release during afterburning is highly complex, making it challenging to determine the TNT equivalence for blast effects in a confined space. Therefore, this remains an active area of research. In this study, internal blast experiments were conducted using TNT and three other explosives under both air and N<sub>2</sub> (Nitrogen) conditions to obtain explosion parameters including blast wave overpressure, quasi-static pressure, and temperature. The influences of oxygen balance and external oxygen content on energy release are analyzed. The author proposes principles for determining TNT equivalence for internal explosions while verifying the accuracy of obtained blast parameters through calculations based on TNT equivalence. These findings can serve as references for predicting blast performance.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"48 ","pages":"Pages 238-249"},"PeriodicalIF":5.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel detection method for warhead fragment targets in optical images under dynamic strong interference environments 动态强干扰环境下光学图像中弹头碎片目标的新型检测方法

IF 5

Defence Technology(防务技术) Pub Date : 2025-01-01 DOI: 10.1016/j.dt.2024.08.008

Guoyi Zhang , Hongxiang Zhang , Zhihua Shen , Deren Kong , Chenhao Ning , Fei Shang , Xiaohu Zhang

{"title":"A novel detection method for warhead fragment targets in optical images under dynamic strong interference environments","authors":"Guoyi Zhang , Hongxiang Zhang , Zhihua Shen , Deren Kong , Chenhao Ning , Fei Shang , Xiaohu Zhang","doi":"10.1016/j.dt.2024.08.008","DOIUrl":"10.1016/j.dt.2024.08.008","url":null,"abstract":"<div><div>A measurement system for the scattering characteristics of warhead fragments based on high-speed imaging systems offers advantages such as simple deployment, flexible maneuverability, and high spatiotemporal resolution, enabling the acquisition of full-process data of the fragment scattering process. However, mismatches between camera frame rates and target velocities can lead to long motion blur tails of high-speed fragment targets, resulting in low signal-to-noise ratios and rendering conventional detection algorithms ineffective in dynamic strong interference testing environments. In this study, we propose a detection framework centered on dynamic strong interference disturbance signal separation and suppression. We introduce a mixture Gaussian model constrained under a joint spatial-temporal-transform domain Dirichlet process, combined with total variation regularization to achieve disturbance signal suppression. Experimental results demonstrate that the proposed disturbance suppression method can be integrated with certain conventional motion target detection tasks, enabling adaptation to real-world data to a certain extent. Moreover, we provide a specific implementation of this process, which achieves a detection rate close to 100% with an approximate 0% false alarm rate in multiple sets of real target field test data. This research effectively advances the development of the field of damage parameter testing.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"43 ","pages":"Pages 252-270"},"PeriodicalIF":5.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142259501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discovering causal models for structural, construction and defense-related engineering phenomena 发现结构、建筑和国防相关工程现象的因果模型

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Defence Technology(防务技术) Pub Date : 2025-01-01 DOI: 10.1016/j.dt.2024.04.007

M.Z. Naser

{"title":"Discovering causal models for structural, construction and defense-related engineering phenomena","authors":"M.Z. Naser","doi":"10.1016/j.dt.2024.04.007","DOIUrl":"10.1016/j.dt.2024.04.007","url":null,"abstract":"<div><div>Causality, the science of cause and effect, has made it possible to create a new family of models. Such models are often referred to as causal models. Unlike those of mathematical, numerical, empirical, or machine learning (ML) nature, causal models hope to tie the cause(s) to the effect(s) pertaining to a phenomenon (i.e., data generating process) through causal principles. This paper presents one of the first works at creating causal models in the area of structural and construction engineering. To this end, this paper starts with a brief review of the principles of causality and then adopts four causal discovery algorithms, namely, PC (Peter-Clark), FCI (fast causal inference), GES (greedy equivalence search), and GRaSP (greedy relaxation of the sparsest permutation), have been used to examine four phenomena, including predicting the load-bearing capacity of axially loaded members, fire resistance of structural members, shear strength of beams, and resistance of walls against impulsive (blast) loading. Findings from this study reveal the possibility and merit of discovering complete and partial causal models. Finally, this study also proposes two simple metrics that can help assess the performance of causal discovery algorithms.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"43 ","pages":"Pages 60-79"},"PeriodicalIF":5.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on cook-off characteristics and thermal safety venting area of RBOE charge RBOE装药烧脱特性及热安全排气面积研究

IF 5

Defence Technology(防务技术) Pub Date : 2025-01-01 DOI: 10.1016/j.dt.2024.08.016

Kebin Zhang , Wenbin Li , Changfang Zhao , Zhifang Wei , Shuxia Zhang , Jin Li

{"title":"Study on cook-off characteristics and thermal safety venting area of RBOE charge","authors":"Kebin Zhang , Wenbin Li , Changfang Zhao , Zhifang Wei , Shuxia Zhang , Jin Li","doi":"10.1016/j.dt.2024.08.016","DOIUrl":"10.1016/j.dt.2024.08.016","url":null,"abstract":"<div><div>RBOE is a new type of DNAN-based high-energy melt-cast mixed explosive, whose safety under thermal stimulation is significantly affected by heating conditions and venting area of the warhead. Based on the thermal decomposition reaction characteristics and combustion characteristics of each component of RBOE explosive, the cook-off calculation models of RBOE warhead before and after ignition were established. In addition, closed and vented warheads were designed, as well as fast and slow cook-off test devices. The cook-off characteristics and thermal safety venting area of RBOE warhead were extensively studied. The results showed that the closed RBOE warhead underwent deflagration reaction under both slow and fast cook-off conditions. The calculation result of the shell wall temperature before slow cook-off ignition response of the warhead was 454.06 K, with an error of +1.75% compared to the test result of 462.15 K, and the temperature rise rate calculated was in good agreement with the test. The calculated ignition time of RBOE warhead under fast cook-off was 161 s, with an error of +8.8% compared to the test result of 148 s, which verified the accuracy of cook-off model of RBOE warhead before ignition. According to the cook-off calculation model of the warhead after ignition and cook-off test of the vented warhead, it was determined that the thermal safety venting area was 1124.61 mm<sup>2</sup> for fast cook-off and 530.66 mm<sup>2</sup> for slow cook-off, effectively preventing the reaction of warhead above combustion. Therefore, this study provides a scientific basis for the thermal safety design and evaluation of insensitive warheads.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"43 ","pages":"Pages 271-287"},"PeriodicalIF":5.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Critical quality indicators of high-performance polyetherimide (ULTEM) over the MEX 3D printing key generic control parameters: Prospects for personalized equipment in the defense industry 高性能聚醚酰亚胺（ULTEM）对 MEX 3D 打印关键通用控制参数的关键质量指标：国防工业个性化设备的发展前景

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Defence Technology(防务技术) Pub Date : 2025-01-01 DOI: 10.1016/j.dt.2024.08.001

Nectarios Vidakis , Markos Petousis , Constantine David , Nektarios K. Nasikas , Dimitrios Sagris , Nikolaos Mountakis , Mariza Spiridaki , Amalia Moutsopoulou , Emmanuel Stratakis

{"title":"Critical quality indicators of high-performance polyetherimide (ULTEM) over the MEX 3D printing key generic control parameters: Prospects for personalized equipment in the defense industry","authors":"Nectarios Vidakis , Markos Petousis , Constantine David , Nektarios K. Nasikas , Dimitrios Sagris , Nikolaos Mountakis , Mariza Spiridaki , Amalia Moutsopoulou , Emmanuel Stratakis","doi":"10.1016/j.dt.2024.08.001","DOIUrl":"10.1016/j.dt.2024.08.001","url":null,"abstract":"<div><div>Additive Manufacturing (AM) can provide customized parts that conventional techniques fail to deliver. One important parameter in AM is the quality of the parts, as a result of the material extrusion 3D printing (3D-P) procedure. This can be very important in defense-related applications, where optimum performance needs to be guaranteed. The quality of the Polyetherimide 3D-P specimens was examined by considering six control parameters, namely, infill percentage, layer height, deposition angle, travel speed, nozzle, and bed temperature. The quality indicators were the root mean square (<em>R</em>q) and average (<em>R</em>a) roughness, porosity, and the actual to nominal dimensional deviation. The examination was performed with optical profilometry, optical microscopy, and micro-computed tomography scanning. The Taguchi design of experiments was applied, with twenty-five runs, five levels for each control parameter, on five replicas. Two additional confirmation runs were conducted, to ensure reliability. Prediction equations were constructed to express the quality indicators in terms of the control parameters. Three modeling approaches were applied to the experimental data, to compare their efficiency, i.e., Linear Regression Model (LRM), Reduced Quadratic Regression Model, and Quadratic Regression Model (QRM). QRM was the most accurate one, still the differences were not high even considering the simpler LRM model.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"43 ","pages":"Pages 150-167"},"PeriodicalIF":5.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation on the anti-detonation performance of composite structure containing foam geopolymer backfill material 含泡沫土工聚合物回填材料的复合结构抗爆性能实验研究

IF 5

Defence Technology(防务技术) Pub Date : 2025-01-01 DOI: 10.1016/j.dt.2024.08.011

Hang Zhou , Hujun Li , Zhen Wang , Dongming Yan , Wenxin Wang , Guokai Zhang , Zirui Cheng , Song Sun , Mingyang Wang

{"title":"Experimental investigation on the anti-detonation performance of composite structure containing foam geopolymer backfill material","authors":"Hang Zhou , Hujun Li , Zhen Wang , Dongming Yan , Wenxin Wang , Guokai Zhang , Zirui Cheng , Song Sun , Mingyang Wang","doi":"10.1016/j.dt.2024.08.011","DOIUrl":"10.1016/j.dt.2024.08.011","url":null,"abstract":"<div><div>The compression and energy absorption properties of foam geopolymers increase stress wave attenuation under explosion impacts, reducing the vibration effect on the structure. Explosion tests were conducted using several composite structure models, including a concrete lining structure (CLS) without foam geopolymer and six foam geopolymer composite structures (FGCS) with different backfill parameters, to study the dynamic response and wave dissipation mechanisms of FGCS under explosive loading. Pressure, strain, and vibration responses at different locations were synchronously tested. The damage modes and dynamic responses of different models were compared, and how wave elimination and energy absorption efficiencies were affected by foam geopolymer backfill parameters was analyzed. The results showed that the foam geopolymer absorbed and dissipated the impact energy through continuous compressive deformation under high strain rates and dynamic loading, reducing the strain in the liner structure by 52% and increasing the pressure attenuation rate by 28%. Additionally, the foam geopolymer backfill reduced structural vibration and liner deformation, with the FGCS structure showing 35% less displacement and 70% less acceleration compared to the CLS. The FGCS model with thicker, less dense foam geopolymer backfill, having more pores and higher porosity, demonstrated better compression and energy absorption under dynamic impact, increasing stress wave attenuation efficiency. By analyzing the stress wave propagation and the compression characteristics of the porous medium, it was concluded that the stress transfer ratio of FGCS-ρ-579 was 77% lower than that of CLS, and the transmitted wave energy was 90% lower. The results of this study provide a scientific basis for optimizing underground composite structure interlayer parameters.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"43 ","pages":"Pages 304-318"},"PeriodicalIF":5.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142188941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic effect of nitrocellulose coating on structural and reactivity stabilization of ammonium nitrate oxidizer 硝化纤维素涂层对硝酸铵氧化剂结构和反应活性稳定化的协同效应

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Defence Technology(防务技术) Pub Date : 2025-01-01 DOI: 10.1016/j.dt.2024.04.017

Amir Abdelaziz , Djalal Trache , Ahmed Fouzi Tarchoun , Hani Boukeciat , Yash Pal , Sourbh Thakur , Weiqiang Pang , Thomas M. Klapötke

{"title":"Synergistic effect of nitrocellulose coating on structural and reactivity stabilization of ammonium nitrate oxidizer","authors":"Amir Abdelaziz , Djalal Trache , Ahmed Fouzi Tarchoun , Hani Boukeciat , Yash Pal , Sourbh Thakur , Weiqiang Pang , Thomas M. Klapötke","doi":"10.1016/j.dt.2024.04.017","DOIUrl":"10.1016/j.dt.2024.04.017","url":null,"abstract":"<div><div>The present work aims to stabilize the room temperature allotropic transition of ammonium nitrate (AN) particles utilizing a microencapsulation technique, which involves solvent/non-solvent in which nitrocellulose (NC) has been employed as a coating agent. The SEM micrographs revealed distinct features of both pure AN and NC, contrasting with the irregular granular surface topography of the coated AN particles, demonstrating the adherence of NC on the AN surface. Structural analysis <em>via</em> infrared spectroscopy (IR) demonstrated a successful association of AN and NC, with slight shifts observed in IR bands indicating interfacial interactions. Powder X-ray Diffraction (PXRD) analysis further elucidated the structural changes induced by the coating process, revealing that the NC coating altered the crystallization pattern of its pure form. Thermal analysis demonstrates distinct profiles for pure and coated AN, for which the coated sample exhibits a temperature increase and an enthalpy decrease of the room temperature allotropic transition by 6 °C, and 36%, respectively. Furthermore, the presence of NC coating alters the intermolecular forces within the composite system, leading to a reduction in melting enthalpy of coated AN by ∼39% compared to pure AN. The thermal decomposition analysis shows a two-step thermolysis process for coated AN, with a significant increase in the released heat by about 78% accompanied by an increase in the activation barrier of NC and AN thermolysis, demonstrating a stabilized reactivity of the AN-NC particles. These findings highlight the synergistic effect of NC coating on AN particles, which contributed to a structural and reactive stabilization of both AN and NC, proving the potential application of NC-coated AN as a strategically advantageous oxidizer in composite solid propellant formulations.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"43 ","pages":"Pages 35-43"},"PeriodicalIF":5.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0