Article
Materials Science, Ceramics
Bo Chen, Norbert Willenbacher
Summary: Due to its high ionic conductivity and stability to lithium metal, Li6.4La3Zr1.4Ta0.6O12 (LLZTO) has become one of the most promising solid electrolyte materials. However, traditional processing technologies lack structural diversity and complexity, making it difficult to be widely used in industrial production. This study presents three LLZTO ink formulations that can be printed with excellent properties, allowing for the fabrication of complex 3D structures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yiliang Wang, Norbert Willenbacher
Summary: This study presents a rapid direct ink writing (DIW) method for soft silicone enabled by a phase-change-induced change of ink microstructure. The method allows for the fabrication of complex, high-resolution 3D silicone structures, with fast control of ink flow behavior and printability. The printed silicone structures demonstrate excellent performance as flexible sensors, superhydrophobic surfaces, and shape-memory bionic devices, showcasing the potential of this new 3D printing strategy.
ADVANCED MATERIALS
(2022)
Article
Engineering, Manufacturing
J. Plog, Y. Jiang, Y. Pan, A. L. Yarin
Summary: By adding an additional electrode to the printhead to generate an electric field, we were able to use Coulomb force to pull extruded ink in the direction of printing, allowing for faster translational speed, thinner trace widths, and improved deposition on rough surfaces without decreasing build height. This electrostatically-assisted direct ink writing technology has shown orders of magnitude faster speed and the capability to print on super-rough surfaces that were previously impossible.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Siqi Ma, Shuai Fu, Shengjian Zhao, Peigang He, Guoru Ma, Meirong Wang, Dechang Jia, Yu Zhou
Summary: By adding suitable additives, high-quality geopolymers can be produced with high yield stresses in their modified inks, enabling DIW of geopolymers with complex patterns, high spatial resolution, and controllable mechanical properties. The study also revealed the fracture behaviors of 3D-printed geopolymers.
ADDITIVE MANUFACTURING
(2021)
Review
Chemistry, Physical
Ting Huang, Wenfeng Liu, Chenliang Su, Ya-yun Li, Jingyu Sun
Summary: This review article provides an overview of direct ink writing (DIW), including its operation principles and basic features. It discusses typical strategies for ink formulation, focusing on commonly used electrode materials such as graphene, Mxenes, and carbon nanotubes. The recent progress in printing design of emerging energy storage systems is summarized, along with the challenges and future perspectives for the development of DIW.
Article
Materials Science, Multidisciplinary
Shane Q. Arlington, Sara C. Barron, Jeffery B. DeLisio, Juan C. Rodriguez, Shashank Vummidi Lakshman, Timothy P. Weihs, Gregory M. Fritz
Summary: This study focuses on direct ink writing of reactive materials using ternary nanocomposite powders, which exhibit gasless, low-velocity reactions. The printed features can be patterned in arbitrary form factors and transformed into mechanically robust, electrically conductive cermets.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Materials Science, Multidisciplinary
Guangbin Zhao, Xiaoxi Shao, Qingxian Zhang, Yanlong Wu, Yaning Wang, Xu Chen, Hang Tian, Yaxiong Liu, Yanpu Liu, Bingheng Lu
Summary: Porous tantalum-titanium-niobium-zirconium (Ta-Ti-Nb-Zr) bio-high entropy alloy (bioHEA) scaffolds were fabricated using direct ink writing 3D printing technology. The scaffolds had interconnected porous structures and a body-centered cubic (BCC) structure due to interdiffusion of metal elements. They exhibited uniform compositions, significant alloying effect, and good biocompatibility. The scaffolds had adjustable mechanical properties with compressive strength ranging from 70.08 to 149.95 MPa and elastic modulus ranging from 0.18 to 0.64 GPa. Their compressive strength was close to that of human cortical bone, meeting the requirements for orthopedic implants in terms of porous structure characteristics and biological and mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Li Zeng, Shangwen Ling, Dayue Du, Hanna He, Xiaolong Li, Chuhong Zhang
Summary: This review focuses on the fundamentals of printable inks and typical configurations of 3D-printed devices in the field of high-performance electrochemical energy storage devices (EESDs). It discusses the challenges and prospects for the fabrication of high-performance 3D-printed EESDs and provides valuable insights into this thriving field.
Review
Chemistry, Multidisciplinary
M. A. S. R. Saadi, Alianna Maguire, Neethu T. Pottackal, Md Shajedul Hoque Thakur, Maruf Md Ikram, A. John Hart, Pulickel M. Ajayan, Muhammad M. Rahman
Summary: Direct ink writing (DIW) is a versatile 3D printing technique that allows printing of a wide range of materials. This comprehensive review explores the process of DIW printing of complex 3D structures and discusses its diverse applications in various industries.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Seongkwon Hwang, Doojoon Jang, Byeongmoon Lee, Yong-Sang Ryu, Jeonghun Kwak, Heesuk Kim, Seungjun Chung
Summary: This paper proposes a three-dimensional compliant thermoelectric generator (TEG) fabricated through direct ink writing, which enables efficient through-plane heat-to-electricity conversion. The rheological properties of carbon nanotube (CNT) thermoelectric inks are engineered to ensure conformal printing, and the electrical conductivity is further enhanced by nozzle-induced CNT packing. By printing polydimethylsiloxane directly on the bottom substrate, the TEG realizes heat harvesting in the out-of-plane direction. It exhibits the highest normalized open-circuit voltage among additively manufactured TEGs and retains remarkable mechanical reliability.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Ceramics
Yazid Lakhdar, Christopher Tuck, Anna Terry, Christopher Spadaccini, Ruth Goodridge
Summary: The study investigated the production of boron carbide monoliths using direct ink writing and pressureless sintering, analyzing the effects of ceramic powder loading, binder concentration, and printing parameters on the final outcome. After optimization, samples achieved a density of around 97% TD and a hardness of around 30 GPa, although pores were observed in 18-layer specimens.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Polymer Science
Shelbie A. Legett, Xavier Torres, Andrew M. Schmalzer, Adam Pacheco, John R. Stockdale, Samantha Talley, Tom Robison, Andrea Labouriau
Summary: Direct ink writing (DIW) allows rapid fabrication of unique 3D printed objects, but the available inks are limited in supply and functionality, leading to the development of new custom inks. This study examined the effect of filler composition, printing parameters, and lattice structure on the printability of new polysiloxane inks. The results suggest that strut diameter and spacing ratio have the most influence on printability, and silica- and metal-filled inks are more predictable than ceramic-filled inks. Higher filler loadings and certain geometries result in stiffer printed parts, and metal-filled inks are more thermally stable compared to ceramic-filled inks. These findings provide important insights into tradeoffs associated with the development of unique and multifunctional DIW inks, printability, and the final material's performance.
Article
Engineering, Manufacturing
Dharneedar Ravichandran, Weiheng Xu, Mounika Kakarla, Sayli Jambhulkar, Yuxiang Zhu, Kenan Song
Summary: This study introduces a new additive manufacturing mechanism, Multiphase Direct Ink Writing (MDIW), which prints individual lines composed of a desirable number of sublayers by matching the viscosity between polymer solutions and nanoparticle suspensions. The 64-layered structure shows the highest modulus, strength, and energy absorption, enhancing the mechanical properties of composite materials.
ADDITIVE MANUFACTURING
(2021)
Article
Polymer Science
Keda Li, Jinghong Ding, Yuxiong Guo, Hongchao Wu, Wenwen Wang, Jiaqi Ji, Qi Pei, Chenliang Gong, Zhongying Ji, Xiaolong Wang
Summary: The three-dimensional printing of SiO2-filled thermosetting polyimide composite with outstanding performance was achieved through direct ink writing and thermal treatment. The composite ink consisted of polyamide acid and silica nanoparticles, which provided self-supporting feedstock and enhanced the performance of the final composite.
Article
Chemistry, Physical
Cheng Zhu, Noah B. B. Schorr, Zhen Qi, Bryan R. R. Wygant, Damon E. E. Turney, Gautam G. G. Yadav, Marcus A. A. Worsley, Eric B. B. Duoss, Sanjoy Banerjee, Erik D. D. Spoerke, Anthony van Buuren, Timothy N. N. Lambert
Summary: The structure-performance relationship in alkaline Zn batteries is important and anode morphology can address various issues. However, tailoring 3D hosts is limited due to increased mass or volume. This study discusses a direct write strategy for producing template-free metallic 3D Zn electrode architectures with high electrical resistivity, submillimeter sizes, and high mechanical stability. The printed Zn lattice anode combined with NiOOH cathode and alkaline polymer gel electrolyte exhibits excellent performance in terms of cycle life and capacity.
Article
Mechanics
Guo-Qing Chen, Hongyuan Li, Pengyu Lv, Huiling Duan
Summary: This paper introduces a phase interface compression term into the multiphase lattice Boltzmann flux solver, achieving excellent interface maintenance. The compression term only operates in the interface region and is solved as the flux. The validation of the model through simulation of various problems confirms its validity and reliability.
Article
Engineering, Marine
Zeqi Shi, Xiangkui Tan, Yiwei Wang, Pengyu Lv, Yong Zou, Xia Wan, Kai Lv, Bingzhen Li, Huiling Duan, Hongyuan Li
Summary: This paper presents the design and fabrication of a cross-domain vehicle (CDV) with four hydrofoils that can navigate on the surface and dive underwater. Experimental tests showed that the hydrofoils improved the stability and surface sailing speed of the CDV, with a maximum speed of 14 knots.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Weiwei Wang, Ke Liu, Meiqi Wu, Hongyuan Li, Pengyu Lv, Huiling Duan
Summary: In this paper, a computational origami design method based on the nonlinear analysis of loaded thin sheets and topology optimization is proposed. By introducing a continuous crease indicator as the design variable and penalizing it with power functions, the method is able to establish the mapping relationships between the crease indicator and hinge properties. By minimizing the structural strain energy with a crease length constraint, the thin sheet can evolve into an origami structure with an optimized crease pattern. Two examples are provided to illustrate the effectiveness and feasibility of the method.
ACTA MECHANICA SOLIDA SINICA
(2023)
Article
Chemistry, Physical
Shengyuan Peng, Yihan Wang, Xin Yi, Yifan Zhang, Ying Liu, Yangyang Cheng, Huiling Duan, Qing Huang, Jianming Xue
Summary: In this study, Cr2AlC single crystal samples were irradiated and their mechanical properties were measured. The results showed that new slip traces were activated after irradiation, and both the yield strength and Young's modulus decreased gradually with increasing irradiation doses, indicating a significant radiation softening effect. This softening effect may be the result of irradiation-induced vacancies, supported by DFT calculations. These findings suggest that MAX phases like Cr2AlC have excellent irradiation tolerance regarding mechanical properties and are promising candidate materials for advanced nuclear systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jingyu Zhang, Shurong Ding, Huiling Duan
Summary: In this study, a cluster dynamics model is proposed to predict the irradiation deformation of hexagonal materials. The model describes the evolutions of point defects and defect clusters with the diffusion anisotropy of self-interstitial atoms. Nucleation and growth models for vacancy, interstitial, and vacancy dislocation loops are developed. Experimental data of irradiated Zr single crystals show good agreement with the simulated growth strains.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Wenbin Liu, Yangyang Cheng, Haonan Sui, Jiaqi Fu, Huiling Duan
Summary: Intergranular fatigue crack nucleation has been found to frequently occur at high angle grain boundaries (HAGBs) but rarely at low angle GBs (LAGBs) during persistent slip band (PSB)-GB interactions. However, the understanding of the role of GB misorientation angles in GB fatigue cracking is limited. In this study, a theoretical framework based on the competition between dislocation transmission and GB cracking is established to investigate this phenomenon. The results show that HAGBs usually have higher resistance to dislocation transmissions, leading to more significant dislocation pile-up and stress concentration, which facilitates GB crack nucleation. The study also emphasizes the importance of GB fatigue damage accumulation and its association with PSB extrusion growth in promoting GB crack nucleation.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mechanics
Baorui Xu, Hongyuan Li, Xiaochao Liu, Yaolei Xiang, Pengyu Lv, Xiangkui Tan, Yaomin Zhao, Chao Sun, Huiling Duan
Summary: Investigating the effect of micro-grooves on drag reduction in Taylor-Couette flow, it was found that the micro-grooves reduce the torque and hence drag in wave vortex flow and modulated wavy vortices flow. However, in turbulent Taylor vortices flow, drag reduction diminishes and eventually turns into drag increase with increasing Reynolds number. Particle image velocimetry measurements revealed that the weakening of large-scale Taylor vortices leads to drag reduction, while roughness effect results in drag increase.
Article
Multidisciplinary Sciences
Feng Zhao, Wenbin Liu, Haonan Sui, Jiaqi Fu, Yangyang Cheng, Jingyu Zhang, Huiling Duan
Summary: In this work, a transformation kinetics model considering the effect of irradiation hardening, shear band evolution and the role of irradiation-induced voids is developed, and a crystal plasticity framework incorporating the newly developed model is established. The framework is capable of capturing the accelerated evolution of martensite volume fraction and simulating two post-irradiation phenomena observed in experiments. This study is one of the first attempts at theoretically modeling the deformation-induced martensitic transformation in irradiated materials, and has the potential to benefit the application of irradiation in tailoring the martensitic transformation behavior.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Chemistry, Physical
Hao Wang, Jingyu Zhang, Huashan Shang, Aixue Sha, Yangyang Cheng, Huiling Duan
Summary: In this study, room-temperature pre-tension experiments and subsequent creep tests were conducted on powder metallurgy Ni-based superalloy FGH96. It was found that increasing amounts of pre-strain led to progressive increases in steady-state creep rate and creep stain. The morphology and distribution of γ' precipitates were not significantly affected by pre-strain, but the dislocation density continuously increased with increasing pre-strains. The increase in the density of mobile dislocations introduced by pre-strain was the main reason for the increase in creep rate. The proposed creep model showed good agreement with experimental data and captured the pre-strain effect.
Article
Mathematics, Interdisciplinary Applications
Jiale Yan, Shaofan Li, Xingyu Kan, Pengyu Lv, A-Man Zhang, Huiling Duan
Summary: In this study, an accurate and stable Updated Lagrangian particle hydrodynamics (ULPH) modeling is developed to simulate complex free-surface fluid flows. Innovative enhanced treatment techniques, including the derivation of the density diffusive term inspired by delta-SPH and a new free-surface search algorithm, are proposed within the ULPH framework. Simulation results confirmed the high accuracy and stability of the proposed ULPH surface flow model in capturing the details of surface flow evolution.
COMPUTATIONAL MECHANICS
(2023)
Article
Engineering, Mechanical
Jiaqi Fu, Wenbin Liu, Haonan Sui, Yangyang Cheng, Jingyu Zhang, Long Yu, Sheng Mao, Huiling Duan
Summary: Helium migration is a crucial mechanism in the embrittlement of irradiated metallic materials, impacting their reliability. This study presents a theoretical model that combines crystal plasticity and helium diffusion to explain the bidirectional dislocation-induced helium transport. Simulation results demonstrate that dislocation motion significantly affects helium migration in austenitic stainless steel, resulting in enriched helium concentration at grain boundaries and a higher risk of intergranular fracture. Additionally, the study reveals the influence of temperature and irradiation defects on helium concentration at grain boundaries by regulating intragranular helium distribution, providing insights into failure mechanisms of irradiated metallic materials.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Wenbin Liu, Feng Zhao, Long Yu, Yangyang Cheng, Huiling Duan
Summary: A constitutive framework involving microplasticity and macroplasticity was established to model the elastic-plastic transition of metallic materials. The significant role of microplasticity in cyclic softening behavior, especially in the irradiated case, was demonstrated. This framework provides a quantitative understanding of microplasticity in crystalline materials and has the potential to inform predictions of material damage and lifetime.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Engineering, Marine
Kai Lv, Yongze Liu, Chenxi You, Yong Zou, Zeqi Shi, Pengyu Lv, Huiling Duan, Hongyuan Li
Summary: Due to the increasing demands in marine resource exploitation and marine defense security deployment, a cross-domain vehicle (CDV) with both high-speed mode as unmanned surface vehicles (USVs) and diving mode as autonomous underwater vehicles (AUVs) is proposed. The CDV utilizes well-tailored hydrofoils to reduce drag, allowing for high-speed cruising on the water surface. Numerical investigations and prototype tests demonstrate the technical feasibility of the CDV, with a maximum drag reduction of 43% and improved longitudinal stability through the elaborate design of the hydrofoils. Flow field analysis reveals the mechanisms behind drag reduction, including inhibition of wave-making and reduction of the wetted surface area.
Article
Mechanics
Guo-Qing Chen, Zengzhi Du, Hongyuan Li, Pengyu Lv, Huiling Duan
Summary: This paper numerically studies the effect of microstructures on flow separation and drag reduction. It is found that microstructures can reduce the motion amplitude of shed vortices, thereby suppressing flow separation and reducing drag. Both the planar and curved microstructures have excellent drag reduction performance.
Article
Multidisciplinary Sciences
Liujun Wu, Jiaqi Fu, Haonan Sui, Xiaoying Wang, Bowen Tao, Pengyu Lv, Mohan Chen, Zifeng Yuan, Huiling Duan
Summary: This study presents a method based on physics-informed neural networks (PINNs) to build yield criteria for porous single crystals. By embedding the associated flow rule into the training process, the resulting yield functions achieve higher accuracy and avoid the improper appearance of grooves in feed-forward neural networks. This framework exhibits excellent portability.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)