Composites Part B: Engineering最新文献_第8页

Enhancement of ultrasonic welding of CFRTP by introducing in-situ laser-etched groove-type energy directors and structural parameter design based on energy absorption theory 引入原位激光蚀刻槽型能量导能器和基于能量吸收理论的结构参数设计，提高CFRTP的超声焊接性能

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-24 DOI: 10.1016/j.compositesb.2026.113440

Jing Dong , Yuchun Liu , Zulai Huang , Li Zhou , Wenfeng Bian , Baoming Wang , Xiaoguo Song

Ultrasonic welding (USW), as an efficient and environmentally friendly joining technology, has demonstrated significant advantages in joining carbon fiber reinforced thermoplastic composites (CFRTP). In terms of improving joint strength, energy directors (ED) are generally introduced as a crucial structure for promoting interfacial heat generation and improving joint quality. To address the drawbacks of complex manufacturing and increased costs associated with traditional external ED structures, novel groove EDs were fabricated in this study using in-situ laser etching on the surface of CF/PA66. Interfacial morphology, mechanical property and fracture morphology at different grid parameters were measured and the reinforcing effect of groove EDs has been verified. Based on acoustic wave propagation theory, the energy absorption mechanism of groove-typed EDs was analyzed and the influence of structural parameters on the interfacial heat accumulation were further elaborated. The results demonstrated that in-situ laser etched EDs enable effective concentration of welding energy, which not only reduces the randomness and dispersion of weld distribution but also significantly increases the melting range, thereby improving joint failure load by 82.3 % compared to the joints without ED. The thermal-mechanical coupling finite element analysis also verified that the heat was concentrated and produced faster at the interface, compared with the joints without EDs. The addition of grid EDs enhances interfacial energy absorption, and the joints exhibit cohesive fracture as the dominant failure mode. The interfacial strengthening mechanism of laser etched EDs can be concluded into two aspects: (i) local protrusions of the grid EDs enhance interfacial viscoelastic heat generation and energy absorption, realizing interfacial heat concentration and further expanding the weld area. (ii) Grooves of the grid structure promote and guide the flow and spreading of molten material, forming mechanical interlocks at the weld edges to further improve joint mechanical properties. This study provides a new process route and theoretical basis for achieving high quality ultrasonic welding of CFRTP.

超声焊接作为一种高效、环保的连接技术，在碳纤维增强热塑性复合材料（CFRTP）的连接中显示出显著的优势。在提高接头强度方面，通常引入能导器（ED）作为促进界面发热和提高接头质量的关键结构。为了解决传统外部ED结构制造复杂和成本增加的缺点，本研究采用原位激光蚀刻方法在CF/PA66表面制备了新型凹槽型ED。测试了不同网格参数下的界面形貌、力学性能和断口形貌，验证了坡口EDs的补强效果。基于声波传播理论，分析了凹槽型能谱的能量吸收机理，并进一步阐述了结构参数对界面积热的影响。结果表明，原位激光刻蚀能团能够有效地集中焊接能量，不仅降低了焊缝分布的随机性和分散性，而且显著增加了熔化范围，从而使接头的破坏负荷比未刻蚀能团的接头提高了82.3%。热-力耦合有限元分析也证实，与未刻蚀能团的接头相比，焊接能团在界面处的热量集中和产生速度更快。栅格能谱的加入增强了界面能吸收，节理以黏结断裂为主。激光刻蚀EDs的界面强化机理可归纳为两个方面：(1)网格型EDs的局部突起增强了界面粘弹性产热和能量吸收，实现了界面热集中，进一步扩大了焊缝面积。（ii）栅格结构的凹槽促进和引导熔融材料的流动和扩散，在焊缝边缘形成机械联锁，进一步提高接头的力学性能。本研究为实现高质量的CFRTP超声焊接提供了新的工艺路线和理论依据。

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引用次数: 0

Eco-friendly aqueous sizing and carbon fiber activation: A dual-pronged strategy for synergistic interfacial enhancement and scalable manufacturing of CF/PEEK composites 环保型水性施胶和碳纤维活化：CF/PEEK复合材料协同界面增强和规模化制造的双管齐下策略

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-19 DOI: 10.1016/j.compositesb.2026.113432

Mingyu Liu , ZhuYi Li , Meng Cao , Weiguo Su , Peng Jin , Shuo Wang

The weak interfacial adhesion between carbon fiber (CF) and polyether ether ketone (PEEK) composites results from the inherently inert surfaces and absence of reactive functional groups. In this work, a sustainable and scalable strategy has been developed to improve the CF/PEEK interface by combining surface-activated CF with a water-based sulfonated PEEK (SPEEK) sizing agent. First, the SPEEK with different sulfonation degrees were prepared by adjusting the reaction time. These SPEEK samples were then used as sizing agents and applied to CF that had been pretreated either with High-temperature (HCF) and Plasma-activation (PCF). The SPEEK coating exhibited strong adhesion to the fiber surfaces and significantly increased the polar component of surface energy, enhancing PEEK slurry impregnation. Notably, the PCF-SPEEK-I and PCF-SPEEK-IV methods demonstrated exceptional performance, achieving a 29.46 % increase in interlaminar shear strength and an 87.41 % improvement in interfacial shear strength compared to the untreated sample. To elucidate the underlying mechanisms, molecular dynamics simulations were conducted on the CF/SPEEK system. The results revealed that the compatibility between molten PEEK and SPEEK—driven by their similar solubility parameters and π-π interactions—facilitates a stable interface during processing. Furthermore, the interfacial shear energy of PCF/SPEEK was 105.28 % higher than that of UCF/PEEK. This enhancement is attributed to hydrogen bonding between the activated fiber's polar groups and SPEEK's sulfonic acid groups, which increases the energy required for shear. This study reveals the synergistic mechanism between surface-activated CF and SPEEK sizing agent, and it presents an environmentally friendly, scalable method for interfacial enhancement of CF/PEEK composites.

碳纤维（CF）与聚醚醚酮（PEEK）复合材料表面固有惰性和缺乏活性官能团是其界面粘附力弱的主要原因。在这项工作中，通过将表面活化的CF与水基磺化PEEK （SPEEK）施胶剂结合，开发了一种可持续且可扩展的策略来改善CF/PEEK界面。首先，通过调整反应时间制备不同磺化度的SPEEK；然后将这些SPEEK样品用作施胶剂，并将其应用于经高温（HCF）和等离子体活化（PCF）预处理的CF。SPEEK涂层对纤维表面具有很强的附着力，显著提高了表面能的极性组分，提高了PEEK浆料的浸渍率。值得注意的是，PCF-SPEEK-I和PCF-SPEEK-IV方法表现出优异的性能，与未经处理的样品相比，层间剪切强度提高了29.46%，界面剪切强度提高了87.41%。为了阐明其潜在机制，对CF/SPEEK体系进行了分子动力学模拟。结果表明，熔融PEEK和speek之间的相容性-由它们相似的溶解度参数和π-π相互作用驱动-有助于在加工过程中形成稳定的界面。PCF/SPEEK的界面剪切能比UCF/PEEK高105.28%。这种增强是由于活化纤维的极性基团和SPEEK的磺酸基团之间的氢键，这增加了剪切所需的能量。本研究揭示了表面活化CF与SPEEK施胶剂之间的协同作用机制，并提出了一种环保、可扩展的CF/PEEK复合材料界面增强方法。

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引用次数: 0

A novel friction stir lap welding of dissimilar aluminum and polymer based on the multi-stage pin 一种基于多级销的异种铝与聚合物搅拌摩擦搭接焊新方法

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-22 DOI: 10.1016/j.compositesb.2026.113437

Shude Ji, Quanyou Zhao, Kaicheng Lu, Yumei Yue, Zhiqing Zhang, Yongli Wang

Friction stir lap welding of dissimilar aluminum and thermoplastic polymers is limited by several challenges, and enhancing macro- and micro-mechanical interlocking is an effective way to achieve a high-strength hybrid lap joint. In this study, an innovatively multi-stage tool pin with the V-shape pin profile of every stage was designed to achieve reliable welding in upper aluminum and lower short glass fiber-reinforced polyetheretherketone (Al/PEEK). Comprehensive analyses of welding temperature, material flow behavior, joint formations, and joint strength were conducted by comparing various process parameters. The results showed that the multi-stage tool pin successfully produced the overflow-free joint with strong macro-mechanical interlockings (dual hooks) formed at relatively high temperature, while the numerous micro-mechanical interlockings were formed at appropriate temperature. The dual hooks, rather than the interconnected hooks, resulted in the tensile fracture mode with the crack path propagating in the lower polymer base material and helped to achieve the high-strength joint. The numerous micro-mechanical interlockings further enabled the strength of the Al/PEEK joint to reach 45.03 MPa. These findings revealed that joint performance was controlled by synergistic macro-mechanical interlocking and micro-mechanical interlocking effects, providing a new insight for metal-polymer joining.

异种铝与热塑性聚合物的搅拌摩擦搭接受到诸多难题的限制，加强宏观和微观力学联锁是实现高强度混合搭接的有效途径。在本研究中，设计了一种创新的多级工具销，每个阶段的销型为v型，以实现上部铝和下部短玻璃纤维增强聚醚醚酮（Al/PEEK）的可靠焊接。通过对各种工艺参数的比较，对焊接温度、材料流动行为、接头形态和接头强度进行了综合分析。结果表明：多级刀销成功地形成了在较高温度下形成的具有强宏观机械联锁（双钩）的无溢流接头，而在适当温度下形成了大量的微观机械联锁。双钩，而不是相互连接的钩，导致拉伸断裂模式，裂纹路径在低聚合物基材中扩展，有助于实现高强度接头。大量的微机械联锁进一步使Al/PEEK接头的强度达到45.03 MPa。这些发现揭示了接头性能受宏观力学联锁和微观力学联锁效应的协同控制，为金属-聚合物连接提供了新的视角。

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引用次数: 0

Boosting EMI Shielding and Joule Heating in Carbon Fiber Paper through lotus seedpod-inspired core-shell nickel nanospheres/ MXene hierarchical reinforcement layer 利用莲籽型核壳镍纳米球/ MXene分层增强层增强碳纤维纸的电磁干扰屏蔽和焦耳加热

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-14 DOI: 10.1016/j.compositesb.2026.113411

Lin Liu , Yan Sun , HaoKai Luo , Yuhui Ao , Lin Jin

The growing demand for electromagnetic interference (EMI) shielding materials emphasizes lightweight design, high shielding efficiency, flexibility, and cost-effectiveness. Although paper-based shielding materials have attracted increasing attention due to their scalable fabrication and excellent processability, several critical challenges still remain: achieving high electromagnetic interference (EMI) shielding effectiveness without sacrificing flexibility, as well as overcoming their limited mechanical strength and insufficient environmental stability. To address these challenges, we proposed a lotus seedpod-inspired core-shell hierarchical reinforcement layer, involving the in-situ growth of uniformly dispersed nickel nanospheres (NiNPs) on original carbon fiber paper (conductivity 4.76 S/cm), followed by MXene nanosheet impregnation to construct a multiscale core-shell architecture. The flexible composite (thickness: 0.20 mm) exhibited an excellent EMI shielding effectiveness (EMI SE) of 69.30 dB, high electrical conductivity of 9.90 S/cm, remarkable mechanical strength of 11.49 MPa, and superhydrophobicity with a water contact angle of 159.6°. The proposed strategy effectively addresses the key challenges of balancing EMI shielding efficiency and multi-performance synergy for paper-based materials, showing great promise for flexible electromagnetic protection applications.

对电磁干扰（EMI）屏蔽材料日益增长的需求强调轻量化设计、高屏蔽效率、灵活性和成本效益。尽管纸基屏蔽材料由于其可扩展的制造和出色的可加工性而引起了越来越多的关注，但仍然存在几个关键挑战：在不牺牲灵活性的情况下实现高电磁干扰（EMI）屏蔽效率，以及克服其有限的机械强度和环境稳定性不足。为了解决这些挑战，我们提出了一种莲子荚启发的核-壳分层增强层，包括在原始碳纤维纸（电导率4.76 S/cm）上原位生长均匀分散的镍纳米球（NiNPs），然后通过MXene纳米片浸渍构建多尺度核-壳结构。该柔性复合材料（厚度为0.20 mm）具有良好的电磁干扰屏蔽效能（EMI SE）为69.30 dB，高电导率为9.90 S/cm，机械强度为11.49 MPa，水接触角为159.6°的超疏水性。所提出的策略有效地解决了平衡EMI屏蔽效率和纸张材料多性能协同的关键挑战，显示出灵活电磁保护应用的巨大前景。

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引用次数: 0

Bioinspired flexible phase change composites for highly efficient solar-thermal-electric conversion and storage 用于高效太阳能-热电转换和存储的仿生柔性相变复合材料

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-07 DOI: 10.1016/j.compositesb.2026.113397

Pan Guo , Xin Zhuo , Keying Zhang , Ligang Zhang , Dejin Zhang , Cong Wang , Takahiro Nomura , Ruijie Zhu , Nan Sheng , Chunyu Zhu , Zhonghao Rao

Global energy security and carbon neutrality goals have accelerated research on renewable energy, but solar intermittency hinders large-scale solar application, making efficient thermal energy storage (TES) crucial. Paraffin wax (PW), a typical phase change material (PCM) for TES, suffers from low thermal conductivity, high molten leakage, and poor solar absorption, limiting its practical use. Inspired by Antarctic penguins' thermal regulation system (feathers-skin-fat), we fabricated a flexible phase change composite (PCC) CF@CuNWs/PW/PDMS/Cu: CF@CuNWs mimic feathers —enhancing solar absorption via localized surface plasmon resonance, CF@CuNWs mimics skin —rapid heat conduction, and PW/PDMS/Cu mimics fat —heat storage/insulation. The PCC shows a thermal conductivity of 1.28 W m⁻¹ K⁻¹, an ultra-low leakage rate, and excellent cyclic stability (negligible latent heat loss after 500 thermal cycles). Under 1.5 sun irradiation, its solar-thermal conversion efficiency reaches 98.6 %, and it outputs a stable 468 mV voltage with a thermoelectric generator. This bioinspired design addresses traditional PCMs’ defects, providing a new strategy for efficient solar energy storage and utilization.

全球能源安全和碳中和目标加速了对可再生能源的研究，但太阳能的间歇性阻碍了太阳能的大规模应用，因此高效的热能储存（TES）至关重要。石蜡（PW）是一种典型的TES相变材料（PCM），其导热系数低，熔液漏量大，太阳能吸收能力差，限制了其实际应用。受南极企鹅热调节系统（羽毛-皮肤-脂肪）的启发，我们制备了一种柔性相变复合材料（PCC） CF@CuNWs/PW/PDMS/Cu: CF@CuNWs模拟羽毛-通过局部表面等离子体共振增强太阳吸收，CF@CuNWs模拟皮肤-快速热传导，PW/PDMS/Cu模拟脂肪-储热/隔热。PCC的导热系数为1.28 W m−1 K−1，泄漏率极低，循环稳定性好（500次热循环后潜热损失可忽略不计）。在1.5太阳照射下，其光热转换效率达到98.6%，通过热电发电机输出稳定的468 mV电压。这种以生物为灵感的设计解决了传统pcm的缺陷，为高效的太阳能存储和利用提供了一种新的策略。

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引用次数: 0

Waxberry-inspired aerogel metamaterial with gradient pore structure for superior electromagnetic wave absorption 具有梯度孔隙结构的杨梅气凝胶超材料，具有优越的电磁波吸收能力

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-13 DOI: 10.1016/j.compositesb.2026.113399

Anping Wang , Zhichun Zhang , Yanju Liu , Jinsong Leng

Lightweight porous aerogels have demonstrated efficient electromagnetic wave absorption performance. Nevertheless, the inherent trade-off between favorable impedance matching at the atmosphere-aerogel interface and strong electromagnetic loss within the aerogel matrix has limited the further improvement of the aerogel's electromagnetic wave absorption performance. In this study, a waxberry-inspired gradient-porous aerogel metamaterial (WGAM) was successfully fabricated via an innovative dot-matrix cooling source ice templating technique. The influences of diverse pore structures and repeating unit sizes on the performance of aerogels were systematically investigated and analyzed. The results reveal that the gradient pore structure in WGAM effectively balances the conflict between interface impedance matching and intrinsic electromagnetic loss, enabling WGAM to achieve an ultrabroad effective absorption bandwidth of 12.3 GHz within the range of 2–18 GHz. Meanwhile, owing to the 3D radial distribution of internal pores, WGAM retains robust electromagnetic wave absorption capacity even when the incident angle of electromagnetic waves is increased from 5° to 30°. Furthermore, WGAM exhibits favorable mechanical, thermal-insulating, and flame-retardant properties, rendering it a promising candidate for electromagnetic protection applications under complex and harsh environmental conditions.

轻质多孔气凝胶具有高效的电磁波吸收性能。然而，在大气-气凝胶界面处良好的阻抗匹配与气凝胶基质内强电磁损耗之间的内在权衡限制了气凝胶电磁波吸收性能的进一步提高。在这项研究中，通过创新的点阵冷却源冰模板技术，成功制备了杨梅启发的梯度多孔气凝胶超材料（WGAM）。系统地研究和分析了不同孔隙结构和重复单元尺寸对气凝胶性能的影响。结果表明，梯度孔结构有效地平衡了界面阻抗匹配与本禀电磁损耗之间的冲突，使WGAM在2-18 GHz范围内实现了12.3 GHz的超远有效吸收带宽。同时，由于WGAM内部孔隙的三维径向分布，即使电磁波入射角从5°增加到30°，WGAM也保持了强大的电磁波吸收能力。此外，WGAM具有良好的机械，隔热和阻燃性能，使其成为复杂和恶劣环境条件下电磁保护应用的有希望的候选者。

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引用次数: 0

4D Printing of continuous fiber-reinforced hybrid lattice structures with electrothermally controlled shape memory behavior 具有电热控制形状记忆行为的连续纤维增强混合晶格结构的4D打印

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2026-01-12 DOI: 10.1016/j.compositesb.2026.113410

Lihan Wang , Feifan Wang , Fankuo Jin , Xiyun Wang , Lin Sang , Yiping Zhao

4D printing has been demonstrated a great potential in adaptive, multifunctional intelligent structures. However, it still faces great challenges in simultaneously achieving high energy absorption, robust load bearing as well as rapid shape restoration after large deformation. To overcome the limitations, a 4D-printed hybrid lattice structure using continuous carbon fiber (CCF) reinforced smart composites was proposed and design. Firstly, the smart polymeric matrix, polylactic acid/thermoplastic polyurethane/carbon nanotube (PT/C) was fabricated, and showed higher shape recovery rate (R_r) and shorter recovery time with increasing carbon nanotube content. Then, the excellent thermal/electrical conductor as well as the reinforcing agent, CCF, was incorporated into the fabricated PT/C matrix. Upon inserting CCF, the R_r of spline sample achieved high R_r of 93.8 %, and the recovery time was also sharply shortened to 28 s under electrical stimulation. Furthermore, a hybrid lattice consisted of PT/C Gyroid infilling and PT/C/CCF re-entrant frame was designed, which possessed superior mechanical performance and shape memory effect. In contrast with unfilled control, the hybrid lattice samples achieved great increases by 98.17 %, 144.24 %, and 65.57 % for compressive strength, modulus and specific energy absorption (SEA). Meanwhile, the electrothermally-controlled shape recovery time reduced from 58 s to 40 s. Finally, finite element analysis was employed to elucidate the stress distribution and heat transfer characteristics within the hybrid lattice. Overall, this study provides a “material-structure” 4D-printing strategy for fabrication lightweight, robust mechanical property and multi-responsive intelligent components.

4D打印在自适应、多功能智能结构方面显示出巨大的潜力。然而，在实现高吸能、强承载和大变形后快速形状恢复的同时，它还面临着很大的挑战。为了克服这种局限性，提出并设计了一种基于连续碳纤维增强智能复合材料的3d打印混合晶格结构。首先，制备了聚乳酸/热塑性聚氨酯/碳纳米管（PT/C）智能聚合物基体，随着碳纳米管含量的增加，其形状恢复率（Rr）提高，恢复时间缩短；然后，将优异的热/电导体以及增强剂CCF掺入制备的PT/C基体中。插入CCF后，样条样品的Rr达到了93.8%的高Rr，电刺激下的恢复时间也大幅缩短至28 s。在此基础上，设计了一种由PT/C Gyroid填充和PT/C/CCF重入框架组成的混合晶格，该混合晶格具有优异的力学性能和形状记忆效果。与未填充对照相比，混合晶格样品的抗压强度、模量和比能吸收（SEA）分别提高了98.17%、144.24%和65.57%。电热控制的形状恢复时间由58 s缩短至40 s。最后，采用有限元方法分析了混合晶格内部的应力分布和传热特性。总的来说，这项研究提供了一种“材料-结构”的3d打印策略，用于制造轻质、坚固的机械性能和多响应的智能部件。

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引用次数: 0

Constructing interfacial transition layers with constant thickness and gradient modulus in carbon fiber composites for mitigating stress concentration and enhancing stress transfer 在碳纤维复合材料中构建等厚度梯度模量的界面过渡层，减轻应力集中，增强应力传递

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2025-12-29 DOI: 10.1016/j.compositesb.2025.113365

Xinke Zhou , Junjie Zhang , Shengkai Liu , Xianyan Wu , Amna Siddique , Nishonov Akbarjon , Siqi Liu , Yue Yin , Chuanbin Yu , Zhiwei Xu

The construction of an interfacial transition layer has become an effective approach to enhancing the overall performance of carbon fiber/epoxy composites (CF/EP). However, there remain numerous gaps about the influence of the thickness and modulus of the interfacial transition layer on the stress transfer behavior of composite materials, thereby limiting the further enhancement of composite material performance. This study precisely constructed a “constant thickness and gradient modulus” interfacial transition layer by regulating the particle size of metal-organic frameworks, and systematically investigated its influence on stress concentration and stress transfer mechanisms. Nanoindentation testing confirmed the successful preparation of interfacial transition layers with a thickness of 1100 nm and modulus gradient rates of −3, −2, −1.4, and +1 respectively. Characterization of interfacial thermal residual stresses revealed that the stress concentration factors for the composite materials were significantly reduced by 28.7 % (gradient rate of +1), 38 % (−3), 47.5 % (−2), and 60.7 % (−1.4) respectively. Finite element simulations indicate that the stress concentration occurs within the interfacial transition layer when the modulus exhibits a non-monotonic modulus variation (+1). In contrast, when the modulus exhibits a decreasing gradient trend (−3, −2, −1.4), the larger the modulus gradient rate, the higher the stress transfer efficiency, and the superior the overall performance of the composite material. It was noteworthy that the composites with a modulus gradient rate of −1.4 exhibited significantly enhanced interfacial shear strength, interlaminar shear strength, and flexural strength by 95.2 %, 23.4 %, and 32.1 % respectively, compared with CF/EP. This research fills a critical gap in the theory of interfacial transition layers, providing a robust foundation for the development of high-performance composites.

界面过渡层的构建已成为提高碳纤维/环氧复合材料（CF/EP）综合性能的有效途径。然而，界面过渡层厚度和模量对复合材料应力传递行为的影响仍存在许多空白，从而限制了复合材料性能的进一步提高。本研究通过调节金属-有机骨架的粒径，精确构建了“等厚度梯度模量”的界面过渡层，并系统研究了其对应力集中的影响和应力传递机制。纳米压痕测试证实成功制备了厚度为1100 nm的界面过渡层，模量梯度率分别为−3，−2,−1.4和+1。界面热残余应力表征表明，复合材料的应力集中系数分别显著降低28.7%（梯度率为+1）、38%（梯度率为−3）、47.5%（梯度率为−2）和60.7%（梯度率为−1.4）。有限元模拟表明，当模量呈现非单调变化（+1）时，应力集中发生在界面过渡层内。当模量呈梯度递减趋势（−3,−2,−1.4）时，模量梯度率越大，应力传递效率越高，复合材料的综合性能越好。值得注意的是，与CF/EP相比，模量梯度率为−1.4的复合材料的界面抗剪强度、层间抗剪强度和抗弯强度分别提高了95.2%、23.4%和32.1%。该研究填补了界面过渡层理论的关键空白，为高性能复合材料的发展提供了坚实的基础。

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引用次数: 0

GO-PPDA modified and aligned PBO fibers for high-performance insulating core-rod composites 用于高性能绝缘芯棒复合材料的GO-PPDA改性和排列PBO纤维

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2025-12-30 DOI: 10.1016/j.compositesb.2025.113379

Le Li , Chi Wang , Hang Gao , Heyu Wang , Tianqi Lai , Zhuangzhuang Li , Xingdou Li , Wenhua Wu , Lei Yang , Yunpeng Liu

Composite insulators for high-voltage power grids are subject to multiple constraints concerning thermal conductivity, mechanical load-bearing capacity, and electrical insulation reliability. Poly(p-phenylene benzobisoxazole) (PBO) fibers are considered an ideal reinforcement phase owing to their excellent mechanical strength, thermal conductivity, and electrical insulation properties, but their smooth and inert surface results in poor interfacial adhesion with the epoxy resin matrix. Moreover, the lack of PBO fibers alignment control limits the full exploitation of their thermal conductivity for high-voltage insulation equipment. In this study, a synergistic strategy was developed to modify the PBO fiber surface with aminated graphene oxide (GO-PPDA) and to align the PBO fibers to enhance the interfacial, mechanical, and thermal properties of the resulting fiber-reinforced composite. In experiments, the interfacial shear strength (IFSS) was increased to a maximum of 57.62 MPa, representing a 54 % improvement over untreated fibers. Molecular dynamics simulations confirmed, at the atomic scale, that the interfacial binding energy was significantly enhanced after GO-PPDA modification. The thermal conductivity of the composite with aligned fibers reached 1.531 W m⁻¹ K⁻¹, which is dramatically higher than that of its randomly oriented counterpart.Optimized amination also improved breakdown strength to 32.5 kV mm⁻¹ while effectively suppressing dielectric loss. Moreover, electrostatic field simulations confirmed that the introduced uniform GO-PPDA contributes to electric field homogenization. Furthermore, the flexural and tensile strengths of the composite were enhanced by 147.9 % and 224.4 %, respectively. This study provides a systematic design strategy for the development of high-performance insulating core rods for composite insulators.

高压电网用复合绝缘子在导热性、机械承载能力和电绝缘可靠性等方面受到多种限制。聚（对苯基苯并苯恶唑）（PBO）纤维由于其优异的机械强度、导热性和电绝缘性能而被认为是一种理想的增强相，但其光滑和惰性的表面导致其与环氧树脂基体的界面附着力差。此外，PBO纤维排列控制的缺乏限制了其在高压绝缘设备中充分利用其导热性。在这项研究中，开发了一种协同策略，用胺化氧化石墨烯（GO-PPDA）修饰PBO纤维表面，并对齐PBO纤维，以提高所得纤维增强复合材料的界面、机械和热性能。在实验中，界面剪切强度（IFSS）增加到最大值57.62 MPa，比未经处理的纤维提高了54%。分子动力学模拟证实，在原子尺度上，GO-PPDA修饰后界面结合能明显增强。排列纤维复合材料的导热系数达到1.531 W m−1 K−1，显著高于随机取向复合材料。优化后的胺化还将击穿强度提高到32.5 kV mm−1，同时有效地抑制了介电损耗。此外，静电场模拟证实了引入的均匀GO-PPDA有助于电场的均匀化。此外，复合材料的抗弯强度和抗拉强度分别提高了147.9%和224.4%。本研究为复合绝缘子高性能绝缘芯棒的研制提供了系统的设计策略。

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引用次数: 0

Advances in 3D printing of SiC ceramic matrix composites: A comprehensive review SiC陶瓷基复合材料3D打印研究进展综述

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering

Pub Date : 2026-03-15 Epub Date: 2025-12-24 DOI: 10.1016/j.compositesb.2025.113342

Guizhou Liu , Wei Zhu , Changshun Wang , Qingchun Yang , Zhufeng Liu , Zhihao Wang , Lu Chai , Annan Chen , Chunze Yan , Yusheng Shi

SiC ceramic matrix composites (SiC CMCs), with their low density, high specific strength, high wear resistance, and high thermal stability, have demonstrated significant application potential and importance in critical fields such as aerospace, nuclear technology, and the automotive industry. However, traditional forming processes often rely on molds and face challenges such as lengthy production cycles, high manufacturing costs, and difficulties in producing complex components. In this context, additive manufacturing (AM), a cutting-edge digital manufacturing technology that integrates the core principles of mechanical engineering, computer science, CNC technology, and materials science, has brought revolutionary changes to the production of SiC CMC components. This technology eliminates the constraints of traditional molds by employing an advanced principle of layer-by-layer construction and stacking, enabling a direct transition from design to finished product. Theoretically, it can precisely form any complex geometric shape, significantly expanding the design freedom and structural complexity of SiC ceramic components. This paper provides an overview of the latest developments in AM research on C_f/SiC CMCs, SiC_f/SiC CMCs, SiC/metal CMCs, and other types of SiC CMCs, and offers insights into the future direction of the field. It is hoped that this review will provide new perspectives and inspiration for relevant researchers, thereby promoting the progress and development of the field.

SiC陶瓷基复合材料（SiC CMCs）具有低密度、高比强度、高耐磨性和高热稳定性等特点，在航空航天、核技术、汽车工业等关键领域显示出巨大的应用潜力和重要性。然而，传统的成形工艺往往依赖于模具，面临着生产周期长、制造成本高、生产复杂部件困难等挑战。在此背景下，增材制造（AM），一种融合了机械工程、计算机科学、CNC技术和材料科学核心原理的尖端数字制造技术，给SiC CMC部件的生产带来了革命性的变化。该技术通过采用一层一层施工和堆叠的先进原理，消除了传统模具的限制，实现了从设计到成品的直接过渡。理论上，它可以精确地形成任何复杂的几何形状，极大地扩展了SiC陶瓷元件的设计自由度和结构复杂性。本文概述了Cf/SiC复合材料、SiCf/SiC复合材料、SiC/金属复合材料和其他类型SiC复合材料增材制造研究的最新进展，并对该领域的未来发展方向提出了见解。希望本文的综述能够为相关研究者提供新的视角和启发，从而促进该领域的进步和发展。

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引用次数: 0