Composites Part A: Applied Science and Manufacturing最新文献_第7页

One stone kills two birds: flexible CuFe2O4@Ti3C2Tx-MXene/cotton fabric inspired by core–shell structure of walnut for radar and infrared compatible stealth 一举两得：灵活的CuFe2O4@Ti3C2Tx-MXene/棉织物，灵感来自核桃核壳结构，用于雷达和红外兼容隐身

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-20 DOI: 10.1016/j.compositesa.2025.109533

Jiatong Yan , Chuanxi Lin , Ming Zhong , Hong Tang , Hongyan Xiao , Ce Cui , Hailin Chen , Ronghui Guo

In order to solve the problem that electromagnetic wave (EMW) absorbing or infrared stealth materials difficultly resist multi-band detection technology and meet wearable requirements, it is meaningful to design single-layer radar and infrared compatible stealth fabric. Inspired by core–shell structure of walnut, CuFe₂O₄@MXene was designed by hydrothermal synthesis and electrostatic self-assembly strategy. CuFe₂O₄@MXene/CF was prepared by blade coating CuFe₂O₄@MXene on cotton fabric. The synergistic effect of dielectric loss and magnetic loss between CuFe₂O₄ and Ti₃C₂T_x-MXene and low infrared emissivity of Ti₃C₂T_x-MXene make CuFe₂O₄@MXene/CF excellent properties of radar and infrared compatible stealth. RL_min reaches −54.96 dB (1.45 mm) at 17.44 GHz and EAB reaches 5.01 GHz (10.03–12.38 GHz and 13.94–16.60 GHz). Density functional theory (DFT) calculations show that charge redistribution at interface between CuFe₂O₄ and MXene enhances dielectric loss, and the structural characteristics of heterogeneous interface improve EMW absorption performance. The average emissivity of CuFe₂O₄@MXene/CF at 3–5 μm and 8–14 μm is 0.529 and 0.491, respectively. The composite fabric still exists radar/infrared stealth performance after bending, stretching, rubbing and washing. This work provides ideas for stability of utilization of radar and infrared compatible stealth fabric.

为了解决电磁波（EMW）吸收或红外隐身材料难以抵抗多波段探测技术并满足可穿戴要求的问题，设计单层雷达与红外兼容隐身织物具有重要意义。受核桃核壳结构的启发，采用水热合成和静电自组装策略设计了CuFe2O4@MXene。在棉织物上涂布CuFe2O4@MXene制备CuFe2O4@MXene/CF。CuFe2O4与Ti3C2Tx-MXene之间介电损耗和磁损耗的协同效应以及Ti3C2Tx-MXene的低红外发射率使得CuFe2O4@MXene/CF具有优异的雷达和红外兼容隐身性能。在17.44 GHz时，RLmin达到−54.96 dB (1.45 mm)， EAB达到5.01 GHz （10.03-12.38 GHz和13.94-16.60 GHz）。密度泛函理论（DFT）计算表明，CuFe2O4与MXene界面处的电荷重分布增加了介质损耗，非均相界面的结构特性提高了EMW吸收性能。CuFe2O4@MXene/CF在3 ~ 5 μm和8 ~ 14 μm处的平均发射率分别为0.529和0.491。复合织物经弯曲、拉伸、摩擦、洗涤后仍具有雷达/红外隐身性能。该工作为雷达和红外兼容隐身织物的稳定性利用提供了思路。

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引用次数: 0

Reinforcement learning for real-time control of Resin Transfer Molding: Bridging simulation and experiments 树脂传递成型实时控制的强化学习：桥接仿真与实验

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-19 DOI: 10.1016/j.compositesa.2025.109511

D. Mocerino , S. Fernández-León , J. Fernández-León , L. Baumela , C. González

Resin Transfer Moulding (RTM) is an out-of-autoclave process widely employed for the production of high-performance composite components. Achieving uniform and defect-free impregnation, however, remains challenging due to uncertainties in resin viscosity, reinforcement permeability, and other process disturbances that influence flow dynamics. In this work, we present a physics-informed Reinforcement Learning (RL) framework for real-time control of the injection pressure in RTM. The approach integrates a custom Level Set–Darcy simulation environment with a Deep Q-Network (DQN) agent, trained to regulate the inlet pressure and maintain a target resin front velocity under varying material and process conditions. Unlike prior studies requiring full visual access to the flow front, the agent relies exclusively on feedback from four pressure sensors distributed along the mould, enhancing its applicability to industrial settings. The RL agent was initially trained in silico using stochastic permeability fields and viscosity variations derived from synthetic data, fostering robust and resilient control strategies. The learned policy was subsequently deployed on a laboratory-scale RTM setup for experimental validation. Results demonstrate that the RL controller successfully preserves the desired filling velocity, compensates for unanticipated variations in resin viscosity and fabric permeability, and accurately reproduces the intended impregnation dynamics. This study highlights the potential of closed-loop adaptive pressure control in RTM using Reinforcement Learning, illustrating its capability to handle process variability. The proposed framework can be further extended to more complex geometries, multi-gate injection systems, and other composite manufacturing processes.

树脂传递模塑（RTM）是一种非高压灭菌工艺，广泛应用于高性能复合材料部件的生产。然而，由于树脂粘度、增强剂渗透性和其他影响流动动力学的工艺干扰的不确定性，实现均匀和无缺陷的浸渍仍然具有挑战性。在这项工作中，我们提出了一个物理信息强化学习（RL）框架，用于实时控制RTM中的注入压力。该方法将定制的Level Set-Darcy模拟环境与Deep Q-Network （DQN）代理集成在一起，经过训练，可以在不同的材料和工艺条件下调节进口压力并保持目标树脂前速度。与之前的研究不同，该试剂完全依赖于分布在模具上的四个压力传感器的反馈，增强了其在工业环境中的适用性。RL药剂最初是在计算机上进行训练的，使用的是来自合成数据的随机渗透率场和粘度变化，从而形成了鲁棒性和弹性的控制策略。随后将学习到的策略部署在实验室规模的RTM设置上进行实验验证。结果表明，RL控制器成功地保持了所需的填充速度，补偿了树脂粘度和织物渗透率的意外变化，并准确地再现了预期的浸渍动态。本研究强调了使用强化学习在RTM中进行闭环自适应压力控制的潜力，说明了其处理过程可变性的能力。所提出的框架可以进一步扩展到更复杂的几何形状，多浇口注射系统和其他复合制造工艺。

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引用次数: 0

Electrical conductivity of hybrid Graphene/CNF Nanofiller-Reinforced epoxy Nanocomposites: Modelling and experiment 石墨烯/CNF纳米填料增强环氧复合材料的电导率：模型与实验

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-19 DOI: 10.1016/j.compositesa.2025.109534

Santosh Kumar , Amit Chanda , Devendra K Dubey , Naresh V. Datla

Electrically conductive polymer composites with hybrid carbon nanofillers are increasingly used in flexible electronics, strain sensors, EMI shielding, and adhesive applications. In this study, a multi-stage and physics-based analytical model has been developed to predict the effective electrical conductivity of ternary polymer nanocomposites, containing 2D graphene nanoplatelets (GNP) and 1D- carbon nanofibers (CNF). While the existing models addresses binary nanocomposites or non-synergistic hybrid fillers, the current study captures the synergistic conductivity improvement from mixed-dimensional nanofillers. The proposed model combines classical analytical techniques, including the Rule of Mixtures and Mean-Field Theory, along with critical physical mechanisms such as the tunnelling resistance, quantum tunnelling effect, and influence of potential barrier height. The proposed model has been validated against the present experimental results and data collected from literature, showing good agreement for both binary GNP/epoxy and ternary GNP/CNF/epoxy nanocomposites. Parametric studies revealed that the percolation threshold and electrical conductivity of the ternary nanocomposites are significantly influenced by the nanofiller aspect ratio (AR), the relative volume fraction of GNP to CNFs, and the waviness of CNFs. The integrated modelling approach provides a comprehensive understanding of the complex conductive behaviour in multi-dimensional nanofiller systems and offers a design tool for high performance conductive ternary polymer nanocomposites.

混合碳纳米填料的导电聚合物复合材料越来越多地用于柔性电子、应变传感器、电磁干扰屏蔽和粘合剂应用。在这项研究中，建立了一个多阶段和基于物理的分析模型来预测含有二维石墨烯纳米片（GNP）和一维碳纳米纤维（CNF）的三元聚合物纳米复合材料的有效电导率。虽然现有的模型针对的是二元纳米复合材料或非协同混合填料，但目前的研究捕获了混合维纳米填料的协同导电性改善。该模型结合了经典的分析技术，包括混合规则和平均场理论，以及关键的物理机制，如隧道阻力、量子隧道效应和势垒高度的影响。本文提出的模型与目前的实验结果和文献数据进行了验证，表明二元GNP/环氧树脂和三元GNP/CNF/环氧树脂纳米复合材料具有良好的一致性。参数研究表明，纳米填料长径比（AR）、GNP与CNFs的相对体积分数以及CNFs的波纹度对三元纳米复合材料的渗透阈值和电导率有显著影响。综合建模方法提供了对多维纳米填料系统复杂导电行为的全面理解，并为高性能导电三元聚合物纳米复合材料的设计提供了工具。

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引用次数: 0

Achieving synergistic improvement of strength-plasticity and heat resistance of titanium matrix composites through β TRIPLEX heat treatment 通过β TRIPLEX热处理，实现钛基复合材料强度塑性和耐热性的协同提高

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-19 DOI: 10.1016/j.compositesa.2025.109532

Hao Wang , Shaopeng Li , Jianwen Le , Bingzhen Pu , Chenlu Zhao , Xue Zhang , Guangfa Huang , Yuanfei Han , Weijie Lu

Achieving synergistic enhancement of strength, plasticity, and heat resistance remains a major challenge for titanium matrix composites. In this study, a β TRIPLEX heat treatment (β₃HT) process was adopted to tailor the matrix microstructure of (TiB + La₂O₃)/IMI834 composite, achieving a synergistic improvement in both room-temperature strength-plasticity and high-temperature strength. EBSD and HRTEM analyses revealed that the second stage α + β solution coarsened the primary α lamellae within acicular structure formed during the first stage β solution, while the final annealing promoted uniform silicide precipitation. Furthermore, β₃HT enhanced the α-variant selection effect of TiB, promoting the formation of coherent or semi-coherent TiB/α interfaces, with their fraction increasing from 2.3 % to 22.5 %. Compared with untreated-TMCs, the treated composite retained similar room-temperature strength (1222 ± 1 MPa vs. 1215 ± 4 MPa) but showed higher uniform ductility, with uniform elongation rising 91 % (3.5 % ± 0.5 % to 6.7 % ± 0.2 %). The high-temperature strength rose nearly 15 %, reaching 860 ± 4 MPa at 600 °C, 757 ± 4 MPa at 650 °C, and 625 ± 2 MPa at 700 °C. This strength improvement arose from the synergistic effects of dislocation pinning by the lamellar microstructure, silicide precipitation strengthening, and load-transfer by TiB.

实现强度、塑性和耐热性的协同增强仍然是钛基复合材料面临的主要挑战。本研究采用β TRIPLEX热处理（β 3ht）工艺对(TiB + La2O3)/IMI834复合材料的基体组织进行了调整，实现了室温强度塑性和高温强度的协同提高。EBSD和HRTEM分析表明，第二阶段α + β溶液使第一阶段α + β溶液形成的针状结构的初级α片层变粗，而最终退火促进了硅化物的均匀析出。此外，β3HT增强了TiB的α-变异选择效应，促进了TiB/α的共相干或半共相干界面的形成，其比例从2.3%增加到22.5%。与未处理的复合材料相比，处理后的复合材料保持了相似的室温强度（1222±1 MPa vs 1215±4 MPa），但具有更高的均匀延展性，均匀伸长率提高了91%（3.5%±0.5%至6.7%±0.2%）。高温强度提高近15%，在600℃时达到860±4 MPa， 650℃时达到757±4 MPa， 700℃时达到625±2 MPa。这种强度的提高是由层状组织的位错钉住、硅化物析出强化和TiB载荷传递的协同作用引起的。

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引用次数: 0

High-temperature sintered conductive adhesives with high conductivity and infrared stealth property 具有高导电性和红外隐身性能的高温烧结导电胶粘剂

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-19 DOI: 10.1016/j.compositesa.2025.109531

Yiqi Xu , Chengwei Jiang , Chunfang Zi , Gaige Li , Fang Liu , Changxiang Hao , Yuanxin Yan , Yanqing Tian

High temperature sintered conductive adhesives’ excellent performance enables their significant applications in the fields of automobile and aerospace. However, such adhesives are also required to possess infrared stealth capabilities to fulfill safety requirements when applied in aerospace and other sectors. Therefore, it is urgent to develop a material with infrared stealth and conductivity. In this work, antimony doped tin oxide (ATO), silver powder and glass powder were mixed into ethyl cellulose matrix to form a kind of composite, which was sintered to obtain a kind of high temperature sintered conductive adhesive − sintered ATO doped conductive adhesives (SACAs). The test results showed that the SACAs possessing 60 wt% silver and 4 wt% ATO exhibited a low resistivity of 5.18 × 10^-5 Ω·cm and excellent infrared stealth ability. This study shows a simple method to prepare new SACAs with multi-functionality, which may broaden the application of the conductive adhesives.

高温烧结导电胶粘剂的优异性能使其在汽车、航空航天等领域得到了广泛的应用。但是，为了满足航空航天等领域的安全要求，这种粘合剂还需要具备红外隐身能力。因此，开发一种具有红外隐身性和导电性的材料迫在眉睫。本文将掺锑氧化锡（ATO）、银粉和玻璃粉混合到乙基纤维素基体中，形成一种复合材料，对其进行烧结，得到一种高温烧结导电胶——掺锑氧化锡导电胶（SACAs）。测试结果表明，含银量为60 wt%、ATO含量为4 wt%的SACAs具有5.18 × 10-5 Ω·cm的低电阻率和优异的红外隐身能力。本研究提供了一种制备新型多功能SACAs的简单方法，可拓宽导电胶粘剂的应用范围。

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引用次数: 0

Surface modification of layered double hydroxides nanocomposites with dopamine for pH-responsive delivery of tebuconazole to improve antifungal activity and biological safety 多巴胺对层状双氢氧化物纳米复合材料表面进行ph响应性修饰以提高苯康唑的抗真菌活性和生物安全性

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-18 DOI: 10.1016/j.compositesa.2025.109530

Junwei Yao , Qian Wang , Qingshan Shi , Chunxin Wang , Jingxia Liu , Ping Huang , Manli Yu , Xiaobao Xie

The effectiveness of conventional fungicides is often limited by poor bioavailability and unacceptable toxicity. Owing to their high loading capacity, long-term validity, and anti-photodegradation, the pH-sensitive layered double hydroxides (LDHs) nanocomposites for controlled release of fungicide is a promising candidate in agricultural protection. As the interfacial regulated modifier, dopamine (DA) with bountiful phenolic hydroxyl group is an ideal synergistic agent to improve interaction with the target organisms. The DA modified tebuconazole (TEB)-LDHs nanocomposites was fabricated for enhancing the antifungal efficacy and biological safety. The cumulative release rates of TEB from TEB-LDHs and TEB-LDHs-DA nanocomposites indicated the pH-sensitive controlled release behavior with a higher cumulative release rate under acid condition. Based on the bioactivity assay, the TEB-LDHs-DA nanocomposites was endowed with a pH responsive stimulus nano-fungicide and exhibited a superior antifungal activity against Fusarium pseudograminearum, for improving delivery capability, inducing intracellular excessive reactive oxygen species, reducing membrane potential and inhibiting ergosterol biosynthesis. The biosafety assay suggested that DA grafted onto TEB-LDHs nanocomposites could effectively reduce the acute toxicity of TEB to zebrafish. Overall, these results demonstrated that DA successfully grafted onto TEB-LDHs nanocomposites was able to provide a nanocomposites platform for responsive stimulus strategy of crop disease control in cost-effective and ecological manner.

传统杀菌剂的有效性往往受到生物利用度差和不可接受的毒性的限制。ph敏感层状双氢氧化物（LDHs）纳米复合材料具有高负荷、长效、抗光降解等特点，是一种很有前景的杀菌剂控释材料。多巴胺（DA）作为界面调节调节剂，具有丰富的酚羟基，是一种理想的增效剂，可以改善与靶生物的相互作用。制备了DA修饰的tebuconazole (TEB)-LDHs纳米复合材料，以提高其抗真菌效果和生物安全性。TEB- ldhs和TEB- ldhs - da纳米复合材料对TEB的累积释放速率均表现出ph敏感性控释行为，在酸性条件下具有较高的累积释放速率。生物活性分析表明，TEB-LDHs-DA纳米复合材料具有pH响应刺激型纳米杀菌剂，对伪谷草镰刀菌具有较强的抗真菌活性，可提高传递能力，诱导细胞内活性氧过剩，降低膜电位，抑制麦角甾醇的生物合成。生物安全性试验表明，将DA接枝到TEB- ldhs纳米复合材料上可以有效降低TEB对斑马鱼的急性毒性。综上所述，将DA成功嫁接到TEB-LDHs纳米复合材料上，能够以经济、生态的方式为作物病害防治的响应性刺激策略提供纳米复合材料平台。

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引用次数: 0

Enhancing electron beam curing efficiency and performance of PDMS coatings via D4H/POSS dual crosslinkers 通过D4H/POSS双交联剂提高PDMS涂层的电子束固化效率和性能

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-18 DOI: 10.1016/j.compositesa.2025.109529

Haozhe Li , Keyan Sheng , Zijian Zhou , Shuai Hao , Fanglue Zhou , Zhenyi Zhang , Yunbo Zhang , Yanlong Gu , Jiang Huang

This study develops a high-performance polydimethylsiloxane (PDMS) nanocomposite coating using a novel dual-crosslinker system of cyclic vinylsiloxane (D4H) and octavinyl polyhedral oligomeric silsesquioxane (POSS) under electron beam (EB) curing. The dual-crosslinker formulation significantly maximized curing efficiency, achieving a stable gel content of 90.4 % at an optimal dose of 150 kGy along with reduced swelling ratio, increased pencil hardness (2H), and 46.7 % lower abrasion loss. This dose represents a 62.5 % reduction compared to single-crosslinker systems, leading to ultrafast curing and consuming 99.5 % less energy than thermal methods. Mechanistic analysis via XPS and EPR confirmed that the EB’s high-energy cascade induces multi-pathway radical crosslinking. This intrinsic advantage, combined with ultrafast kinetics suppressing POSS sedimentation, ensures a highly dense and uniform network. The resulting coating exhibits superior mechanical properties, significantly enhanced thermal stability, and exceptional resistance to thickness effects, establishing an efficient and sustainable manufacturing route for advanced polymer matrix composites in engineering applications.

本研究以环乙烯基硅氧烷（D4H）和辛烷基聚寡聚硅氧烷（POSS）为双交联剂，在电子束（EB）固化下制备了高性能聚二甲基硅氧烷（PDMS）纳米复合涂层。双交联剂配方显著提高了固化效率，在最佳剂量为150 kGy时，凝胶含量稳定在90.4%，同时降低了溶胀率，提高了铅笔硬度（2H），磨损损失降低了46.7%。与单交联剂体系相比，该剂量减少了62.5%，导致超快速固化，比热方法消耗的能量少99.5%。通过XPS和EPR的机制分析证实，EB的高能级联诱导了多途径自由基交联。这种固有的优势，结合超快动力学抑制POSS沉降，确保了高密度和均匀的网络。由此产生的涂层具有优异的机械性能、显著增强的热稳定性和卓越的抗厚度效应，为工程应用中的先进聚合物基复合材料建立了高效和可持续的制造路线。

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引用次数: 0

Reflectivity characterization of thermoplastic composite tapes for automated fiber placement: A rapid measurement technique 用于自动铺放纤维的热塑性复合胶带的反射率特性：一种快速测量技术

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-18 DOI: 10.1016/j.compositesa.2025.109514

T.J. Asijee , I.J. Geschiere , M.I. Abdul Rasheed , W.J.B. Grouve , R. Akkerman

This study proposes a fast camera-based measurement to characterize the directional reflectivity of a fiber-reinforced thermoplastic composite tape. The method has potential use cases for measurement of within-batch and batch-to-batch material variations for laser-assisted automated fiber placement, and is able to identify differences in the consolidation state of a material. The acquired reflectivity patterns are parameterized using a bi-directional reflectance distribution function. The facet orientation distribution assumed in this bi-directional reflectance distribution is compared to measured facet orientation distributions derived from height measurements, providing insight in the accuracy of the assumed distribution. As an application, the reflectivity measurement is applied to specimens on as-received tapes and specimens after in-situ consolidation during automated fiber placement. The reflectivity measurement is sufficiently accurate to capture significant differences in the reflectivity pattern based on the consolidation state of a thermoplastic composite tape. The current methodology acquires information on the directional reflectivity in a tenth of a second, offering potential for acquiring large quantities of data as part of an off-line or in-line inspection system.

本研究提出了一种基于相机的快速测量方法来表征纤维增强热塑性复合材料胶带的定向反射率。该方法具有潜在的用例，用于测量激光辅助自动化光纤放置的批内和批间材料变化，并且能够识别材料固结状态的差异。利用双向反射分布函数参数化获得的反射率模式。将这种双向反射分布中假设的面朝向分布与由高度测量得出的测量面朝向分布进行比较，从而深入了解假设分布的准确性。作为一种应用，反射率测量应用于接收胶带上的样品和自动光纤放置过程中原位固结后的样品。反射率测量足够精确，可以捕捉基于热塑性复合胶带固结状态的反射率模式的显著差异。目前的方法可以在十分之一秒内获取定向反射率信息，为离线或在线检测系统获取大量数据提供了可能。

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引用次数: 0

Synergistic interactions of aerogel and liquid metal: a novel aerogel-reinforced metal matrix composite for advanced aerospace applications 气凝胶和液态金属的协同作用：用于先进航空航天应用的新型气凝胶增强金属基复合材料

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-18 DOI: 10.1016/j.compositesa.2025.109525

Klaudia Trembecka-Wojciga , Dorota Lachowicz , Sylwia Terlicka , Anna Korneva , Katarzyna Berent , Marcin Sikora , Sudipta Seal , Angelika Kmita , Natalia Sobczak

In the realm of space and aviation technologies, materials must endure extreme temperatures, vacuum conditions, micrometeoroids, and space debris. These materials require high mechanical strength, corrosion resistance, and low weight. Metal matrix composites (MMCs) are often utilized due to their superior properties compared to non-composite materials. This study explores the integration of silica aerogel granules into metal matrices to form innovative composite materials. Aerogels, known for their low density and exceptional thermal insulation properties, are investigated for their potential to enhance aerospace applications. Despite their promising insulating properties, aerogels alone lack mechanical strength, necessitating their combination with other materials. This research focuses on the interaction between liquid aluminum and SiO₂-CeO₂ aerogels at high temperatures, aiming to create strong bonds and reinforced composites. High-temperature wettability tests using the sessile drop method reveal the formation of a robust and permanent connection between the aluminum and aerogel. SEM, XPS, and XAS analyses confirm the occurrence of chemical reactions at the interface, resulting in the formation of Al₂O₃ and the infiltration of aluminum into the aerogel matrix. The resultant Al/aerogel composite material demonstrates enhanced mechanical properties and thermal stability, offering significant potential for aerospace applications due to its lightweight nature and improved structural integrity.

在空间和航空技术领域，材料必须承受极端温度、真空条件、微流星体和空间碎片。这些材料要求机械强度高、耐腐蚀、重量轻。金属基复合材料（MMCs）由于其优于非复合材料的性能而被广泛使用。本研究探索将二氧化硅气凝胶颗粒整合到金属基体中，形成创新的复合材料。气凝胶以其低密度和优异的隔热性能而闻名，目前正在研究其在航空航天领域的应用潜力。尽管气凝胶具有良好的绝缘性能，但其本身缺乏机械强度，因此需要与其他材料结合使用。这项研究的重点是液态铝和SiO2-CeO2气凝胶在高温下的相互作用，旨在建立强键和增强复合材料。高温润湿性测试使用的固定式滴法显示铝和气凝胶之间形成了牢固而永久的连接。SEM， XPS和XAS分析证实界面处发生了化学反应，导致Al2O3的形成和铝渗入气凝胶基质。由此产生的Al/气凝胶复合材料具有增强的机械性能和热稳定性，由于其轻质特性和改进的结构完整性，在航空航天应用中具有巨大的潜力。

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引用次数: 0

Wide-temperature-range mechanical properties and precision prediction of additively manufactured continuous glass fiber reinforced PEEK composites 增材制造连续玻璃纤维增强PEEK复合材料的宽温度范围力学性能及精度预测

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-12-17 DOI: 10.1016/j.compositesa.2025.109505

Hao Zhang , Yiwei Chen , Wenzhe Song , Congze Fan , Jing-hua Zheng , Zhongde Shan

Additive manufacturing of continuous fiber reinforced polymer composites enables precise fiber placement and design flexibility, positioning it as a key technology for aerospace and automotive component fabrication. Evaluating the composites mechanical behavior across a wide temperature range is crucial, since large variations in stiffness and strength at low or high service temperatures can undermine the reliability of aerospace or high-precision applications. In this study, continuous glass fiber reinforced poly-ether-ether-ketone Composites (CGF/PEEK) specimens fabricated by additive manufacturing were subjected to tensile, flexural and interlaminar shear tests over a wide temperature range from –100 °C to 250 °C. The failure mechanism and performance evolution with increasing temperature were revealed, with tensile strength dropping by 28.8 % and flexural strength by 70.5 % at 250 °C. A Co–kriging surrogate model integrating high–fidelity (HF) test data with low–fidelity (LF) simulation data was developed and it reduced the maximum prediction error to ± 5 % and improved accuracy by over 35 % in the glass transition temperature (T_g) region compared to traditional Kriging and Support Vector Regression (SVR). This study provides a foundation for the engineering deployment of CGF/PEEK components produced by additive manufacturing across a wide operational temperature range for aerospace applications.

连续纤维增强聚合物复合材料的增材制造能够实现精确的纤维放置和设计灵活性，将其定位为航空航天和汽车部件制造的关键技术。在较宽的温度范围内评估复合材料的力学性能是至关重要的，因为在低温或高温下刚度和强度的巨大变化会破坏航空航天或高精度应用的可靠性。在这项研究中，通过增材制造制造的连续玻璃纤维增强聚醚-醚-酮复合材料（CGF/PEEK）试样在-100°C至250°C的宽温度范围内进行了拉伸、弯曲和层间剪切试验。揭示了其破坏机理和性能随温度升高的演变规律，在250℃时，拉伸强度下降28.8%，弯曲强度下降70.5%。结合高保真度（HF）测试数据和低保真度（LF）模拟数据，开发了一个Co-kriging代理模型，与传统的Kriging和支持向量回归（SVR）相比，该模型将玻璃化转变温度（Tg）区域的最大预测误差降低到±5%，准确度提高了35%以上。该研究为增材制造生产的CGF/PEEK组件在航空航天应用的广泛工作温度范围内的工程部署提供了基础。

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