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中国机械工程学报：增材制造前沿（英文）
中国机械工程学报：增材制造前沿（英文）
中国机械工程学报：增材制造前沿（英文）/Journal Chinese Journal of Mechanical Engineering: Additive Manufacturing Frontiers
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    Systematic and Intriguing Insights into Additive Manufacturing:From Feedstock and Processing Perspectives

    Zhangwei ChenDichen Li
    1-2页
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    Vat Photopolymerization versus Conventional Colloidal Processing Methods in Structural Ceramics:Progress,Challenges,and Future Perspectives

    Yehua LiPengfei ShengLifu LinLiang Wang...
    3-32页
    查看更多>>摘要：Additive manufacturing(AM)has become a versatile and diverse technology that has a significant impact on manufacturing processes.Therefore,ceramic materials have been developed rapidly for use in AM processes.Vat photopolymerization(VPP)is an AM method that enables the production of dense ceramic components with increased dimensional accuracy.In particular,it facilitates the fabrication of small and intricately shaped parts.This review summarizes the research advancements in ceramics prepared via VPP.Special attention is paid to the current status of relevant areas,such as slurry preparation and process optimization,as well as the form-ing mechanisms,debinding,sintering,performance characterization,and use of VPP-based ceramics.Moreover,earlier studies performed by our research group on numerous VPP-based ceramic aspects are considered.In ad-dition,a concise overview of the differences in forming principles,mechanical performance,advantages,and disadvantages between VPP-based ceramics and conventional colloidal-forming ceramics is presented.Finally,the challenges and prospects of VPP-based ceramics are discussed.
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    The Applications and Latest Progress of Ceramic 3D Printing

    Qun DiaoYong ZengJimin Chen
    33-56页
    查看更多>>摘要：In recent years,there has been significant growth in the demand from both domestic and international markets for ceramic 3D printing technology.This surge in interest has led to rapid advancements in research and applica-tion.Ceramic 3D printing has been applied successfully in diverse fields,including healthcare,cultural creativity,and architectural decoration.Its appeal lies in eliminating the need for molds during manufacturing,resulting in cost-effectiveness,high production efficiency,and unparalleled freedom in structural design.Compared to traditional ceramic molding processes,various industries have widely embraced the advantages of ceramic 3D printing.The current focus of researchers lies in strategic emerging fields,such as healthcare,aerospace,and elec-tronic communication.Researchers conduct multifaceted research on ceramic 3D printing technology in these areas and are eager to invest in industrial development.This article overviews the latest research and application progress in ceramic 3D printing technology in the fields above.In addition,it analyzes the challenges and tech-nical bottlenecks faced by ceramic 3D printing technology in different domains.Moreover,this study explores the opportunities and demands for further development in materials research and development,equipment man-ufacturing,and application field expansion.By examining these aspects,this study sheds light on the immense potential that ceramic 3D printing holds for future growth and innovation.
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    Viscoelastic Paste-Based Ceramic vat Photopolymerization:Recent Achievements and Future Developments

    Zhanwen XingWeiwei LiuHongzhi ZhouRuiyong Wei...
    57-73页
    查看更多>>摘要：Ceramic vat photopolymerization(VPP)enables the fabrication of complex components with excellent properties and high precision.However,compared with metals and polymers,the industrial application of ceramic VPPs remains relatively limited.This can be attributed to the challenges associated with ceramic feedstock printability,the complexity of the printing process,insufficient performance evaluation,and service verification.To overcome these limitations,the design of a viscoelastic paste and corresponding VPP strategies offer a promising solution.This paper presents a review of the research on the state of viscoelastic ceramic paste-based VPP.The main tech-nical aspects,including the paste design,support strategies,green-body cleaning,and subsequent post-treatment,are discussed.Furthermore,representative applications of VPP for various types of advanced ceramics are sur-veyed.This review also highlights the technical challenges involved and provides suggestions for addressing these issues.Finally,future directions for promoting the additive manufacturing of advanced ceramic components with enhanced efficiency and reliability are discussed.
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    Recent Advances in Preceramic Polysilazane Precursors in Additive Manufacturing

    Jian WangQian ZhangSai LiJinyuan Zhao...
    74-85页
    查看更多>>摘要：Si3N4/SiCN ceramics have been extensively explored for applications in the aerospace,mechanical engineering,and biomedical fields.Recently,there has been significant focus on the additive manufacturing(AM)of polymer-derived ceramic(PDC)technology for fabricating Si3N4/SiCN ceramics.The chemical structure and composition of the preceramic polymer precursors have a crucial influence on the performance of ceramic products.In this paper,recent advances in the use of polysilazane and polycarbosilazane precursors in AM are reviewed and an outlook for future development is presented.The findings of this study could spark inspiration and reflection regarding AM applications and synthetic technology.It is believed that the development of PDCs in ceramic fabrication will become more versatile and application-oriented and provide more freedom in the design of high-performance ceramics.
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    Lightweight Cf/SiC Composites with High Fiber Content Fabricated by Binder Jetting Additive Manufacturing and Liquid Silicon Infiltration

    Shidong HuKunhao FengQihang WangJiangtao Sun...
    86-95页
    查看更多>>摘要：In this study,Cf/SiC composites with excellent mechanical and thermal properties were prepared by combining binder jetting(BJ)additive manufacturing with liquid silicon infiltration(LSI)process.The introduction of Cf into the Cf/SiC mixed powder reduced its spreading ability,which reduced the density,strength,and precision of the Cf/SiC green parts.However,phenolic resin infiltration and pyrolysis(PRIP)treatment compensated for the decrease in the density of the green parts resulting from the introduction of Cf.By optimizing the number of PRIP cycles to increase the pyrolytic carbon(PyC)content in the carbonized parts,the Cf in the green parts successfully prevented the reaction with molten Si in the LSI and played an important role in strengthening and toughening the composites.The flexural strength,fracture toughness,and thermal conductivity of the Cf/SiC composites reached the maximum values of 316±16 MPa,4.81±0.12 MPa·m1/2,and 140 W/m·K,respectively.This study presents future opportunities for the cost-effective and efficient industrial manufacturing of Cf/SiC complex structures.
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    3D Printing of Gradient-Doped Yb∶YAG Laser Ceramics by Leveraging Active Mixing

    Mengmeng XieHaohao JiDewen WangJunping Wang...
    96-102页
    查看更多>>摘要：Gradient-doped laser ceramics fabricated via 3D printing have great potential for high-power laser applications.However,it is challenging to produce such types of gain media because it is inconvenient to fabricate different component slurries prepared offline using traditional methods precisely.To address these issues,a facile approach for the additive manufacturing of high-power laser ceramics is proposed for gradient structure fabrication.First,a material-extrusion-based 3D printing device with a homemade active mixing module is developed to fabricate gradient-doped Yb∶YAG(Y3Al5O12)laser ceramics using two slurries with different doping concentrations.Sub-sequently,the active mixing module is systematically investigated to obtain different Yb-doped concentrations of printing slurries with a uniform element distribution.By measuring the switching delay volume between dif-ferent components,a proper volume adjustment enables the Yb concentration distribution of the green bodies to be consistent with the designed profile in the 3D process.Finally,multi-component(0-5-10-5-0 at％Yb∶YAG)green bodies are printed,and experimental tests are conducted to evaluate the performance of these gradient-doped laser ceramics.The results show that the gradient-doped ceramic obtained 82.1％in-line transmittance at 1100 nm(4.6 mm thickness,along with the doping concentration gradient)and the average Yb ions diffusion distance across the interface fitted in the 20-30 pm range.Furthermore,a 1030 nm laser output with an output power of 4.5 W with a slope efficiency of 41.3％is achieved when pumped with a 940 nm laser diode.This study provides useful insights for developing various gradient rare-earth-doped laser ceramics for high-power laser applications.
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    Polyelectrolyte Multilayer Coating on 3D Printed PEGDA/TCP Scaffold with Improved Cell Proliferation

    Xingguo ZhouBin ZouQinghua ChenQingguo Lai...
    103-111页
    查看更多>>摘要：Bioactive coating of ceramic scaffolds is an effective way to ameliorate osseointegration and attenuate implant-induced inflammatory responses,which should be biocompatible and possess suitable mechani-cal properties to regulate cell adhesion and migration.In this study,a poly(ethylene glycol)diacry-late/tricalcium phosphate(PEGDA/TCP)ceramic scaffold was prepared using SLA-3D printing,and its com-pressive strength was 8.9±1.0 MPa.Chitosan(Chi)and chondroitin sulfate(CS)were assembled on the sur-face of the PEGDA/TCP scaffolds and crosslinked with 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide/N-hydroxysuccinimide(EDC/NHS).Scanning electron microscope(SEM),Fourier transform infrared(FTIR),and laser scanning microscope were used to evaluate the surface modification of the PEGDA/TCP scaffolds.Cellu-lar tests showed that polyelectrolyte multilayers(PEMs)promoted cell adhesion and proliferation of osteoblasts relative to unmodified scaffolds.Furthermore,it can be demonstrated that the SLA-3D printed TCP scaffolds could meet the compressive requirements of trabecular bones,and the bioactivity of the bone scaffolds could be effectively improved by combining them with Chi/CS PEM.
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    Suitability Analysis for Extrusion-Based Additive Manufacturing Process

    Sadettin Cem AltιparmakSamuel I.Clinton Daminabo
    112-133页
    查看更多>>摘要：Additive manufacturing(AM)is a widely applied manufacturing paradigm used for the layer-by-layer fabrica-tion of desired components and objects,especially for those with highly intricate geometry.Extrusion-based AM,which is a subcategory of AM processing technologies,is characterized by the facilitation of controlled and successive deposition of feedstock AM materials through the nozzles of printer heads onto a print bed.Extrusion-based AM processing enables design freedom but offers cost efficiency and process simplicity when compared to other AM categories i.e.liquid-and powder-based AM technologies.The extrusion-based AM process has become increasingly widespread over the last two decades because of the expanding material options that can be used in this technology,and its capacity to be hybridised through the addition of multiple printheads or incorpora-tion into a secondary manufacturing system.Despite the promising aspects of the extrusion-based AM process,increasing demands for customised extrusion-based printed products and an expanding range of extrusion-based AM materials create both material-and process-related challenges that limit the suitability of extrusion-based AM processes for some specific applications.Consequently,the principal objective of this review paper is to conduct a suitability analysis of extrusion-based AM processes.The suitability analysis follows a review and discussion about the extrusion-based AM process,and an assessment of easy-and hard-to-print extrusion-based AM mate-rials.This paper,therefore,provides a comprehensive suitability analysis of each extrusion-based AM process while also providing some promising ideas for improving their current suitability levels.The findings and ratings reported in this paper importantly offers viewpoints that would support better futuristic comparisons between developed and developing extrusion-based AM processes,especially as businesses look to adopt the right AM solutions.
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    Advances and Applications of 4D-Printed High-Strength Shape Memory Polymers

    Jing ZhangMingkun XuNan ZhangTingmei Wang...
    134-159页
    查看更多>>摘要："Life"represents a distinctive attribute inherent to organisms in nature,evident in their capacity to actively adapt to changes in their environment.In contrast to the static and intricate constructs of additive manufacturing(AM),the dynamic structure of 4D printing(4DP)adeptly integrates AM technology,responsive mechanisms,and external stimuli,imbuing it with a semblance of"life."This fusion significantly broadens its functional applica-tions across biomedicine,actuators,and metamaterials.The escalating demand across diverse fields necessitates heightened criteria for 4DP,encompassing rapid response,multi-stimulus response,large shape change,and specific mechanical properties(e.g.,high strength,high modulus)capable of accommodating varying environ-mental conditions.In recent years,shape memory polymers(SMPs)have garnered increasing attention among 4DP researchers due to their ease of design and preprogramming at the molecular level,facilitating controlled transformations along predictable pathways.However,4DP of high-strength SMPs,as an indispensable part of the high-performance field,is full of challenges because the intrinsic properties of the raw materials are not well compatible with the printing principle and the printed configuration is not flexible enough.Consequently,this paper provides a concise overview of the response mechanisms and applications of five prominent high-strength SMPs utilized in 4DP:epoxy resin,poly(ether-ether-ketone),polyimide,polylactic acid,and polyurethane.Ad-ditionally,it delves into the associated challenges and prospects,offering researchers valuable insights into the potential value of high-strength SMPs within the domain of 4DP.
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