Composites Part A: Applied Science and Manufacturing最新文献

英文中文

Obtaining high-performance SiCf/SiC by combined CVI and PIP processes with moderately enhanced BN weak interphase

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-02 DOI: 10.1016/j.compositesa.2025.108768

Dongcheng Han , Lin Qi , Rui Yang , Yi Zhang , Yucong Wei , Fang Ye , Laifei Cheng

2D SiC_f/SiC composites with excellent mechanical properties were successfully prepared by hybrid chemical vapor infiltration (CVI) and precursor infiltration and pyrolysis (PIP) processes, which consisted of depositing a protective layer of CVI-SiC on the fiber preform with BN interphase, followed by cyclic precursor infiltration and pyrolysis until densification. The volume ratio of CVI-SiC matrix to PIP-SiC matrix of 3:1 showed the most desirable mechanical properties with the highest flexural strength of 720.1 ± 32.1 MPa and fracture toughness of 34.2 ± 1.1 MPa·m^1/2. The enhancement of strength was attributed to the efficient filling of pores achieved by the two hybrid processes, with the best performing sample density of 2.52 g/cm³. The synergistic increase in toughness was achieved by controlling the state of internal stress and further increasing the interfacial shear strength. The fiber Push-in tests showed that the interfacial shear strength increases with the increasing of the CVI-SiC content, and finally a weak BN interphase with a moderate enhancement effect was obtained with an interfacial shear strength of 34.1 ± 5.3 MPa. The results illustrated that the combined CVI and PIP processes with adjustable composition and stress were able to provide new design ideas for improving the mechanical properties of SiC_f/SiC.

{"title":"Obtaining high-performance SiCf/SiC by combined CVI and PIP processes with moderately enhanced BN weak interphase","authors":"Dongcheng Han , Lin Qi , Rui Yang , Yi Zhang , Yucong Wei , Fang Ye , Laifei Cheng","doi":"10.1016/j.compositesa.2025.108768","DOIUrl":"10.1016/j.compositesa.2025.108768","url":null,"abstract":"<div><div>2D SiC<sub>f</sub>/SiC composites with excellent mechanical properties were successfully prepared by hybrid chemical vapor infiltration (CVI) and precursor infiltration and pyrolysis (PIP) processes, which consisted of depositing a protective layer of CVI-SiC on the fiber preform with BN interphase, followed by cyclic precursor infiltration and pyrolysis until densification. The volume ratio of CVI-SiC matrix to PIP-SiC matrix of 3:1 showed the most desirable mechanical properties with the highest flexural strength of 720.1 ± 32.1 MPa and fracture toughness of 34.2 ± 1.1 MPa·m<sup>1/2</sup>. The enhancement of strength was attributed to the efficient filling of pores achieved by the two hybrid processes, with the best performing sample density of 2.52 g/cm<sup>3</sup>. The synergistic increase in toughness was achieved by controlling the state of internal stress and further increasing the interfacial shear strength. The fiber Push-in tests showed that the interfacial shear strength increases with the increasing of the CVI-SiC content, and finally a weak BN interphase with a moderate enhancement effect was obtained with an interfacial shear strength of 34.1 ± 5.3 MPa. The results illustrated that the combined CVI and PIP processes with adjustable composition and stress were able to provide new design ideas for improving the mechanical properties of SiC<sub>f</sub>/SiC.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108768"},"PeriodicalIF":8.1,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143343097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orientation of macro/microscopic structures in anisotropic materials through 3D printing: Rheological behavior, processing, and properties

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-02 DOI: 10.1016/j.compositesa.2025.108767

Xinyu Guo, Huan Jiao, Xuyang Guo, Chengyang Du, Dongsheng Shi, Wenjuan Wu, Yongcan Jin, Bo Jiang

Anisotropic materials have attracted a surge of interest due to their unique features along different directions, enabling widespread applications in tissue engineering, energy storage, sensing, and soft robotics. Over the last decades, 3D printing has been widely employed to tune anisotropic materials with desired macro/microstructures. In view of these achievements, the rheological behavior, processing, and properties of anisotropic materials are comprehensively reviewed. The characteristics of 3D printing techniques that commonly used for anisotropic material orientation are firstly summarized. Then, the impacts of rheology, printing parameters, and external environments (electric and magnetic fields) on the orientation of anisotropic materials, and their microstructure, mechanical, optical, thermal, and electronic properties are critically discussed to help understand the structure–property-function relationships. An outlook on high-resolution 3D printing, combination with emerging technologies, hybrid manufacturing, and microstructure regulation to address current challenges is also discussed to promote the advanced applications of 3D printed anisotropic materials.

{"title":"Orientation of macro/microscopic structures in anisotropic materials through 3D printing: Rheological behavior, processing, and properties","authors":"Xinyu Guo, Huan Jiao, Xuyang Guo, Chengyang Du, Dongsheng Shi, Wenjuan Wu, Yongcan Jin, Bo Jiang","doi":"10.1016/j.compositesa.2025.108767","DOIUrl":"10.1016/j.compositesa.2025.108767","url":null,"abstract":"<div><div>Anisotropic materials have attracted a surge of interest due to their unique features along different directions, enabling widespread applications in tissue engineering, energy storage, sensing, and soft robotics. Over the last decades, 3D printing has been widely employed to tune anisotropic materials with desired macro/microstructures. In view of these achievements, the rheological behavior, processing, and properties of anisotropic materials are comprehensively reviewed. The characteristics of 3D printing techniques that commonly used for anisotropic material orientation are firstly summarized. Then, the impacts of rheology, printing parameters, and external environments (electric and magnetic fields) on the orientation of anisotropic materials, and their microstructure, mechanical, optical, thermal, and electronic properties are critically discussed to help understand the structure–property-function relationships. An outlook on high-resolution 3D printing, combination with emerging technologies, hybrid manufacturing, and microstructure regulation to address current challenges is also discussed to promote the advanced applications of 3D printed anisotropic materials.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108767"},"PeriodicalIF":8.1,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing the interfacial thermal resistance between liquid crystal epoxy and hexagonal boron nitride: An investigation from molecular dynamics simulations at the atomic level to macroscopic properties

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-01 DOI: 10.1016/j.compositesa.2025.108766

Xiao Yan Pang , Ze Ping Zhang , Fei Liang , Shule Liu , Min Zhi Rong , Ming Qiu Zhang

To gain a profound understanding of the interfacial heat transport mechanisms in hexagonal boron nitride (h-BN)/liquid crystal epoxy (LCE) composites, the theoretical simulation and experimental validation approaches are combined for clarifying the relationship between interfacial microstructure, interfacial thermal resistance (ITR) and macroscopic thermal conductivities of the h-BN/LCE composites. Molecular dynamics simulations (MD) show that LCE molecules can be closely packed on the h-BN surface to lower the ITR by 21 %∼42 %, in comparation to that of amorphous epoxy. Afterwards, the interfacial interactions between h-BN and LCE, and the interface phase thickness (2.305 nm) are experimentally confirmed. Meantime, the reduced ITR are examined to be 15 ∼ 65 % via laser flash method. The produced h-BN/linear LCE composites containing 95 wt% h-BN platelets exhibit excellent in-plane and through plane thermal conductivities up to 77.01 and 12.67 W m⁻¹ K⁻¹, which exceed 25.8 % and 55.8 % those of the amorphous epoxy composite. It proves that the mesogens adsorbed on h-BN surface provides a straightforward approach to reduce ITR and enhance thermal conductivities of resultant composites. Besides, non-covalent and covalent modifications of h-BN allow to further diminish the ITR and facilitate heat transfer. The outcomes are believed to promote the application of h-BN/LCE composites in thermal management materials.

{"title":"Reducing the interfacial thermal resistance between liquid crystal epoxy and hexagonal boron nitride: An investigation from molecular dynamics simulations at the atomic level to macroscopic properties","authors":"Xiao Yan Pang , Ze Ping Zhang , Fei Liang , Shule Liu , Min Zhi Rong , Ming Qiu Zhang","doi":"10.1016/j.compositesa.2025.108766","DOIUrl":"10.1016/j.compositesa.2025.108766","url":null,"abstract":"<div><div>To gain a profound understanding of the interfacial heat transport mechanisms in hexagonal boron nitride (h-BN)/liquid crystal epoxy (LCE) composites, the theoretical simulation and experimental validation approaches are combined for clarifying the relationship between interfacial microstructure, interfacial thermal resistance (ITR) and macroscopic thermal conductivities of the h-BN/LCE composites. Molecular dynamics simulations (MD) show that LCE molecules can be closely packed on the h-BN surface to lower the ITR by 21 %∼42 %, in comparation to that of amorphous epoxy. Afterwards, the interfacial interactions between h-BN and LCE, and the interface phase thickness (2.305 nm) are experimentally confirmed. Meantime, the reduced ITR are examined to be 15 ∼ 65 % via laser flash method. The produced h-BN/linear LCE composites containing 95 wt% h-BN platelets exhibit excellent in-plane and through plane thermal conductivities up to 77.01 and 12.67 W m<sup>−1</sup> K<sup>−1</sup>, which exceed 25.8 % and 55.8 % those of the amorphous epoxy composite. It proves that the mesogens adsorbed on h-BN surface provides a straightforward approach to reduce ITR and enhance thermal conductivities of resultant composites. Besides, non-covalent and covalent modifications of h-BN allow to further diminish the ITR and facilitate heat transfer. The outcomes are believed to promote the application of h-BN/LCE composites in thermal management materials.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108766"},"PeriodicalIF":8.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143342704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling nonlinear, hysteretic, and irreversible moisture-induced deformation of CFRP based on two-phase diffusion theory

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-02-01 DOI: 10.1016/j.compositesa.2025.108765

Kazuya Kitamoto , Shu Minakuchi , Tomohiro Yokozeki

Water or moisture absorption causes swelling and plasticization of polymers and polymer matrices in composites. Predicting the long-term deformation of composite structures is crucial for the feasibility study of advanced space observation satellites. This study developed a model to explain the nonlinear, hysteretic, and irreversible moisture-induced deformation of epoxy-based CFRP structures during moisture absorption and desorption. The model was based on a modified two-phase diffusion theory, incorporating molecular-level analyses of water-polymer interactions and polymer networks. Water transport and moisture-induced deformation mechanisms were comprehensively interpreted using gravimetric analysis, nuclear magnetic resonance (NMR), positron annihilation lifetime spectroscopy (PALS), and optical fiber sensing. The results showed that bound water diffused preferentially during absorption, while free water transport dominated during desorption. Even after long-term desorption, some water remained strongly bound to hydrophilic sites in the epoxy matrix, leading to irreversibility in the system. The modified two-phase diffusion models successfully captured this behavior. The nonlinear strain behavior was then formulated using a piecewise linear function model, which accounted for both volume expansion due to plasticization and contraction due to anti-plasticization, depending on the bound water concentration. The model reproduced the strain hysteresis observed in the experiment, confirming that the hysteresis resulted from the differences in water diffusion behavior during absorption and desorption. Finally, the model’s prediction was compared with the long-term deformation measurement of a composite tube, validating its accuracy in predicting moisture-induced deformation in a practical structure.

{"title":"Modeling nonlinear, hysteretic, and irreversible moisture-induced deformation of CFRP based on two-phase diffusion theory","authors":"Kazuya Kitamoto , Shu Minakuchi , Tomohiro Yokozeki","doi":"10.1016/j.compositesa.2025.108765","DOIUrl":"10.1016/j.compositesa.2025.108765","url":null,"abstract":"<div><div>Water or moisture absorption causes swelling and plasticization of polymers and polymer matrices in composites. Predicting the long-term deformation of composite structures is crucial for the feasibility study of advanced space observation satellites. This study developed a model to explain the nonlinear, hysteretic, and irreversible moisture-induced deformation of epoxy-based CFRP structures during moisture absorption and desorption. The model was based on a modified two-phase diffusion theory, incorporating molecular-level analyses of water-polymer interactions and polymer networks. Water transport and moisture-induced deformation mechanisms were comprehensively interpreted using gravimetric analysis, nuclear magnetic resonance (NMR), positron annihilation lifetime spectroscopy (PALS), and optical fiber sensing. The results showed that bound water diffused preferentially during absorption, while free water transport dominated during desorption. Even after long-term desorption, some water remained strongly bound to hydrophilic sites in the epoxy matrix, leading to irreversibility in the system. The modified two-phase diffusion models successfully captured this behavior. The nonlinear strain behavior was then formulated using a piecewise linear function model, which accounted for both volume expansion due to plasticization and contraction due to anti-plasticization, depending on the bound water concentration. The model reproduced the strain hysteresis observed in the experiment, confirming that the hysteresis resulted from the differences in water diffusion behavior during absorption and desorption. Finally, the model’s prediction was compared with the long-term deformation measurement of a composite tube, validating its accuracy in predicting moisture-induced deformation in a practical structure.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108765"},"PeriodicalIF":8.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143343096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrahigh-solid-content silica/epoxy composite for high-performance semiconductor packaging

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesa.2025.108757

Wei-Cheng Chao, Chia-Pei Chu, Ying-Chih Liao

Packaging materials are crucial for chip performance, directly impacting heat dissipation, warpage, and signal quality. However, balancing flowability and solid content often limits their effectiveness. Herein, a novel methodology is developed for creating ultrahigh-solid-content liquid molding compounds (LMCs) with low viscosity and exceptional properties. By establishing a mathematical model that accurately predicts composites’ viscosity and optimal maximum packing density based on binary size-distributed samples, achieving 78.0 vol% LMC. Its excellent flowability enables superior processability, with precise thickness control and low surface roughness on wafer coatings. The low thermal expansion coefficient (α₁ = 11.4 ppm °C⁻¹) ensures minimal warpage and strong adhesion. Dielectric properties (Dk/Df = 2.62/0.0062) significantly lower than commercial FR-4 materials are reached. Besides a high flexural strength of 142.2 MPa, the 78 vol% LMC demonstrates thermal conductivity (1.33 W m⁻¹ K⁻¹) closely approaching pure silica. These outstanding properties highlight the practicality of the ultrahigh-solid-content LMCs for advanced wafer-level packaging applications.

{"title":"Ultrahigh-solid-content silica/epoxy composite for high-performance semiconductor packaging","authors":"Wei-Cheng Chao, Chia-Pei Chu, Ying-Chih Liao","doi":"10.1016/j.compositesa.2025.108757","DOIUrl":"10.1016/j.compositesa.2025.108757","url":null,"abstract":"<div><div>Packaging materials are crucial for chip performance, directly impacting heat dissipation, warpage, and signal quality. However, balancing flowability and solid content often limits their effectiveness. Herein, a novel methodology is developed for creating ultrahigh-solid-content liquid molding compounds (LMCs) with low viscosity and exceptional properties. By establishing a mathematical model that accurately predicts composites’ viscosity and optimal maximum packing density based on binary size-distributed samples, achieving 78.0 vol% LMC. Its excellent flowability enables superior processability, with precise thickness control and low surface roughness on wafer coatings. The low thermal expansion coefficient (<em>α<sub>1</sub></em> = 11.4 ppm °C<sup>−1</sup>) ensures minimal warpage and strong adhesion. Dielectric properties (<em>Dk/Df</em> = 2.62/0.0062) significantly lower than commercial FR-4 materials are reached. Besides a high flexural strength of 142.2 MPa, the 78 vol% LMC demonstrates thermal conductivity (1.33 W m<sup>−1</sup> K<sup>−1</sup>) closely approaching pure silica. These outstanding properties highlight the practicality of the ultrahigh-solid-content LMCs for advanced wafer-level packaging applications.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108757"},"PeriodicalIF":8.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143343057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reactive 3D printed silanized cellulose nanofiber aerogels for solar-thermal regulatory cooling

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesa.2025.108761

Tianyi Zhu , Zeyu Ren , Debao Wang , Sudan Zhao , Xue Liu , Wei Fan , Yue-E Miao , Chao Zhang , Tianxi Liu

Polymer aerogels exhibit promise as solar-thermal co-management materials, offering combined thermal insulation and solar scattering characteristics. However, challenges persist in their large-scale preparation and pore structure tailoring. Herein, a polymethylsilsesquioxane interwoven cellulose nanofiber aerogel scaffold with improved interlayer interfaces and tunable pore sizes is prepared via reactive 3D printing. The resulting 3D-printed aerogel scaffold exhibits minimal volume shrinkage during freeze-drying and significantly enhanced interlayer interfaces, demonstrating superior fatigue resistance and impressive environmental resilience. The significantly decreased pore sizes in the aerogel scaffold greatly enhance full solar scattering through the Mie scattering mechanism. Utilized as a hydrophobic and flame-retardant solar–thermal regulatory cooler, the aerogel scaffold demonstrates a solar reflectance of 94.2 % and an atmospheric window emissivity of 95.6 %. The aerogel scaffold achieves a cooling power of 72.2 W m⁻² with an average sub-ambient cooling of 5.8 °C under direct sunlight.

{"title":"Reactive 3D printed silanized cellulose nanofiber aerogels for solar-thermal regulatory cooling","authors":"Tianyi Zhu , Zeyu Ren , Debao Wang , Sudan Zhao , Xue Liu , Wei Fan , Yue-E Miao , Chao Zhang , Tianxi Liu","doi":"10.1016/j.compositesa.2025.108761","DOIUrl":"10.1016/j.compositesa.2025.108761","url":null,"abstract":"<div><div>Polymer aerogels exhibit promise as solar-thermal co-management materials, offering combined thermal insulation and solar scattering characteristics. However, challenges persist in their large-scale preparation and pore structure tailoring. Herein, a polymethylsilsesquioxane interwoven cellulose nanofiber aerogel scaffold with improved interlayer interfaces and tunable pore sizes is prepared via reactive 3D printing. The resulting 3D-printed aerogel scaffold exhibits minimal volume shrinkage during freeze-drying and significantly enhanced interlayer interfaces, demonstrating superior fatigue resistance and impressive environmental resilience. The significantly decreased pore sizes in the aerogel scaffold greatly enhance full solar scattering through the Mie scattering mechanism. Utilized as a hydrophobic and flame-retardant solar–thermal regulatory cooler, the aerogel scaffold demonstrates a solar reflectance of 94.2 % and an atmospheric window emissivity of 95.6 %. The aerogel scaffold achieves a cooling power of 72.2 W m<sup>−2</sup> with an average sub-ambient cooling of 5.8 °C under direct sunlight.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108761"},"PeriodicalIF":8.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143343059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Additive fiber tethering for 3D architected continuous fiber composites

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesa.2025.108763

Md Habib Ullah Khan , Md Mohaiminul Islam , Kaiyue Deng , Ismail Mujtaba Khan , Ling Liu , Kelvin Fu

Continuous composites offer substantial benefits to the composite industry, providing exceptional part strength and durability, but manufacturing complex topology optimized architected parts remains a challenge due to limited design flexibility and difficulty in achieving adaptable fiber orientation. This study presents an innovative approach, Additive Fiber Tethering (AFT), to additively manufacture topology optimized structures inspired by truss-based lattice. In this process, in situ impregnated towpregs are deposited across uniquely designed scaffold’s spatially distributed anchor points, enabling the formation of topology optimized architecture not possible with traditional composite manufacturing methods. For demonstration, an architected B-pillar is fabricated with spatially oriented continuous fibers for automotive applications. This approach aids the additive manufacturing and filament winding of topology optimized composite parts with continuous fibers, delivering key benefits such as enhanced weight reduction without compromising mechanical strength. This new manufacturing technology has great potential to advance composite applications in aerospace, automotive, and energy sectors.

{"title":"Additive fiber tethering for 3D architected continuous fiber composites","authors":"Md Habib Ullah Khan , Md Mohaiminul Islam , Kaiyue Deng , Ismail Mujtaba Khan , Ling Liu , Kelvin Fu","doi":"10.1016/j.compositesa.2025.108763","DOIUrl":"10.1016/j.compositesa.2025.108763","url":null,"abstract":"<div><div>Continuous composites offer substantial benefits to the composite industry, providing exceptional part strength and durability, but manufacturing complex topology optimized architected parts remains a challenge due to limited design flexibility and difficulty in achieving adaptable fiber orientation. This study presents an innovative approach, Additive Fiber Tethering (AFT), to additively manufacture topology optimized structures inspired by truss-based lattice. In this process, in situ impregnated towpregs are deposited across uniquely designed scaffold’s spatially distributed anchor points, enabling the formation of topology optimized architecture not possible with traditional composite manufacturing methods. For demonstration, an architected B-pillar is fabricated with spatially oriented continuous fibers for automotive applications. This approach aids the additive manufacturing and filament winding of topology optimized composite parts with continuous fibers, delivering key benefits such as enhanced weight reduction without compromising mechanical strength. This new manufacturing technology has great potential to advance composite applications in aerospace, automotive, and energy sectors.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"192 ","pages":"Article 108763"},"PeriodicalIF":8.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143343058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

T700 or T300 with Nano-/Micro- Aramid fiber mechanical cross-linking: Flexural properties of carbon fiber composites before and after impact

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesa.2025.108760

Fankai Lin , Xiaozhi Hu , Fei Cheng , Mingxin Ye , Yunsen Hu , Zhaohui Huang

Flexural and compressive failures of carbon fiber composites, more critical than direct tensile failure, imply T700 with higher tensile strength (about 40 % higher than T300) can still be outperformed by T300 in flexure and compression through careful composite microstructure designs. We show mechanical cross-linking from nano-/micro- Aramid Pulp (AP) fibers of a few hundred microns in length can be generated if the interleaving thickness is reduced to around or below 20 μm. Flexural properties of T300 with mechanical cross-linking from AP (4–6 g/m²) are more superior than those of T700, both before and after low energy impacts. Up to 40 % and up to 50 % increase in shear and flexural strengths were observed. This work compared flexural properties and impact resistance of T700 and AP toughened T300 composites, showing the importance of structural design (e.g. using thin layer interlayer AP cross-linking) for higher strength and toughness simultaneously.

{"title":"T700 or T300 with Nano-/Micro- Aramid fiber mechanical cross-linking: Flexural properties of carbon fiber composites before and after impact","authors":"Fankai Lin , Xiaozhi Hu , Fei Cheng , Mingxin Ye , Yunsen Hu , Zhaohui Huang","doi":"10.1016/j.compositesa.2025.108760","DOIUrl":"10.1016/j.compositesa.2025.108760","url":null,"abstract":"<div><div>Flexural and compressive failures of carbon fiber composites, more critical than direct tensile failure, imply T700 with higher tensile strength (about 40 % higher than T300) can still be outperformed by T300 in flexure and compression through careful composite microstructure designs. We show mechanical cross-linking from nano-/micro- Aramid Pulp (AP) fibers of a few hundred microns in length can be generated if the interleaving thickness is reduced to around or below 20 μm. Flexural properties of T300 with mechanical cross-linking from AP (4–6 g/m<sup>2</sup>) are more superior than those of T700, both before and after low energy impacts. Up to 40 % and up to 50 % increase in shear and flexural strengths were observed. This work compared flexural properties and impact resistance of T700 and AP toughened T300 composites, showing the importance of structural design (e.g. using thin layer interlayer AP cross-linking) for higher strength and toughness simultaneously.</div></div>","PeriodicalId":282,"journal":{"name":"Composites Part A: Applied Science and Manufacturing","volume":"191 ","pages":"Article 108760"},"PeriodicalIF":8.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143260862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fracture experiments of coated and non-coated epoxy-alumina composites coupled with micro-CT

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-01-31 DOI: 10.1016/j.compositesa.2025.108762

Yichun Tang , Yanran Wang , Michael C. Hillman , Jiun-Shyan Chen , Jing Du

Polymer-ceramic composites are widely used in electronic devices, biomedical engineering and other applications. This paper presents the results of an experimental study on the effects of silane coating on the fracture properties of epoxy-alumina composite. Mechanical testing coupled with micro X-ray computed tomography (micro-CT) was performed to investigate epoxy-alumina composite’s fracture behaviors. The matrix-particle interface was shown to be the weakest link in non-coated composites. Guided by the discovery, silane coating was applied to the particles to enhance the matrix-particle interfacial adhesion. The occurrence of matrix-particle interface debonding was reduced and delayed for composites with silane treatment on the particle surfaces. Ultimately, the fracture toughness and crack growth resistance of the composites were improved.

引用次数: 0

Performance of In-situ Automated Fibre Placement Parts

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing

Pub Date : 2025-01-30 DOI: 10.1016/j.compositesa.2025.108725

Ashley R. Chadwick , Georg Doll , Ulrich Christ , Sabrina Maier , Sylvia Lansky

Despite being a relatively mature manufacturing technology, in-situ automated fibre placement is still yet to see industrial implementation for the manufacturing of primary and secondary aircraft structures owing to fears of high porosity and inferior mechanical properties. In this study, carbon fibre-reinforced PPS is used as a reference material, with which several laminates are manufactured both in-situ and as preforms for subsequent press consolidation. The mechanical, thermal, and tomography results reveal that for the correct manufacturing process parameters, in-situ laminates from can outperform pressed laminates in certain areas and reach 90% of their performance in others. The porosity is also seen to reduce during the manufacturing process, decreasing to 1.1% from the unprocessed prepreg material 2.2%. These results indicate a promising future for the inclusion of in-situ parts in the coming generations of transport vehicles.

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全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

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Composites Part A: Applied Science and Manufacturing

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