Advanced Science
·
2024
·
IF 14.3
Junyu Cai,Songhua Ma,Wenbin Yi,Jieping Wang
Current additive manufacturing (AM) techniques for tungsten, such as powder bed fusion and directed energy deposition, often generate parts with rough surfaces. Vat photopolymerization presents a promising alternative for fabricating tungsten structures with high shape fidelity and low surface roughness. However, existing vat photopolymerization approaches suffer from surface defects and low final density, leading to compromised mechanical properties. Therefore, achieving high-density tungsten structures using vat photopolymerization remains a crucial challenge. This work presents a straightforward and reliable method for fabricating complex, micro-architected tungsten structures with superior density and hardness. The approach utilizes a water-based photoresin with exceptional tungsten ion loading capacity. The photoresin is then patterned using digital light processing (DLP) to create tungsten-laden precursors. A three-step debinding and sintering process subsequently achieves 3D tungsten structures with dense surface morphology and minimal internal defects. The microstructures achieve a minimum feature size of 35 µm, a low surface roughness of 2.86 µm, and demonstrate exceptional mechanical properties. This new method for structuring tungsten opens doors to a broad range of applications, including micromachining, collimators, detectors, and metamaterials.
研究领域:
材料科学
·
增材制造
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Haiman Xu,Rongzhen Liu,Chonggao Bao,Hao Li,Zhichao Cao,Na Huang
Aluminum nitride (AlN) ceramics are increasingly utilized across various applications due to their exceptional theoretical thermal conductivity. To enable the fabrication of AlN ceramics with customized structures, digital light processing (DLP) technology has been explored for producing complex geometries. However, challenges arise due to AlN’s high refractive index and susceptibility to moisture absorption, which affect the curing characteristics and rheology of AlN slurries used in DLP. This study systematically examined the curing behavior and rheological properties of AlN slurries. Initially, the impact of photosensitive resin compositions and photoinitiators on curing depth and excess width were investigated. The results revealed that with a resin mixture ratio of 3:4:3 (mixed resin, high refractive index resin, and 9,10-Diphenylanthracene) and the addition of 5wt% of 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, the optimal curing depth of 90 μm was achieved, with an excess width of less than 0.1 mm. Additionally, the incorporation of 3wt% KH560 reduced the sedimentation rate and viscosity. The AlN slurry with 50vol% solid loading was prepared with the high curing depth of 73μm and low viscosity of 20.5 Pa.s at the shear rate of 27s -1 . Subsequently, the effects of buring powder for debinding process was investigated. Finally, a AlN ceramic body with a porosity of 2.97 %, bulk density of 3.08g/cm 3 , and flexural strength of 107.2MPa was obtained upon sintering at 1900 °C for 4 h.
研究领域:
材料科学
·
陶瓷制造
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Xiaoxiang Ren,Jian Wang,Yan Wu,Yuan Zhang,Jieyuan Zhang,Long Bai,Jinlong Liu,Guangfeng Li,Peiran Song,Zhongmin Shi,Jiacan Su
Three-dimensional (3D) bioprinting has revolutionized tissue engineering by enabling precise fabrication with bioinks. Among these techniques, digital light processing (DLP) stands out due to its exceptional resolution, speed, and biocompatibility. However, the progress of DLP is hindered by the limited availability of suitable bioinks. Currently, some studies involve simple mixing of different materials, resulting in bioinks that lack uniformity and photopolymerization characteristics. To address this challenge, we present an innovative one-pot synthesis method for bioinks based on methacrylated gelatin/alginate with hydroxyapatite (HAP). This approach offers significant advantages in terms of efficiency and uniformity. The synthesized bioinks demonstrate excellent printability, stability, and notably enhanced mechanical properties, facilitating optimal in vitro compatibility. Additionally, the HAP-hybrid bioinks printed scaffolds demonstrated impressive bone repair capabilities in vivo compared with pure organic bioinks. In conclusion, the Gel/Alg/HAP bioinks presented herein offer an innovative solution for DLP bioprinting within the field of bone tissue engineering. Their multifaceted advantages help overcome the limitations of restricted bioink choices, pushing forward the boundaries of bioprinting technology and contributing to the progress of regenerative medicine and tissue engineering.
研究领域:
组织工程学
·
再生医学
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产品关联
DOI
高影响因子
Additive Manufacturing
·
2025
·
IF 11.1
Yazhou Peng,Wenyue Zhao,Zhao Wang,Lei Shi,Wenjing Hua,Xiaoxia Yang,Jie Wang,Weidong Fei,Yu Zhao,Changhong Wang
Three-dimensional (3D) printing of silica glass provides significant advantages for the fabrication of silica glass with complex structures. However, auxiliary support structures are generally needed due to the low stiffness and strength of green parts, which limits the flexibility of the structure design. It is imperative to increase the strength of the green part and remove the support structures for improving the molding capacity and printing quality. This study introduces an approach for 3D printing of silica glass with complex structures by digital light processing (DLP) based on the high-strength green parts, which exhibits superior molding capacity. By comparing three monomers of 2-hydroxyethyl methacrylate (HEMA), 2-hydroxyethyl acrylate (HEA), and 4-hydroxybutyl acrylate (4-HBA), it was demonstrated that high photopolymerization reactivity is a key factor for improving the mechanical properties of green parts. Green parts printed with 4-HBA exhibit a combination of high modulus, high strength, and high conversion degree. Following heat treatment, these complex-structured green parts transform into dense, transparent silica glass. The specific compressive strength of silica glass with a lattice meta-structure reaches 4.94 × 10 4 N m kg −1 . This study enhances structural design flexibility in the 3D printing of silica glass, providing a novel perspective for future research.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Haiman Xu,Rongzhen Liu,Chonggao Bao,Na Huang,Pan Li,Hao Li
Aluminum nitride (AlN) ceramics are widely utilized in various applications due to their exceptional properties. However, fabricating complex AlN components using conventional machining techniques remains challenging. To address this issue, Digital Light Processing (DLP) is proposed as a viable technique for manufacturing intricate AlN ceramics. A key challenge in this process is the moisture absorption and hydrolysis of AlN powders, which significantly increase slurry viscosity and affect the layer-by-layer accumulation of AlN slurry. This study systematically investigated the particle size distribution, rheological behavior, and curing kinetics of AlN slurry processed with different ball-milling times. At a ball-milling time of 8 h, the slurry with a 54 vol% solid loading exhibited a viscosity of 21.1 Pa.s at a shear rate of 27 s −1 and a curing depth of 83 μm at an energy dose of 74.4 mJ/cm². Following debinding and sintering, the sintered AlN ceramics achieved a flexural strength of 98.7 MPa, a bulk density of 2.74 g/cm³ , and an open porosity of 12.82 %. These findings provide critical insights into optimizing slurry preparation and processing parameters for the DLP-based fabrication of AlN ceramics.
研究领域:
材料科学
·
陶瓷加工
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产品关联
DOI
高影响因子
Additive Manufacturing
·
2024
·
IF 10.3
Donglin Lu,Kunji Lin,Xianle He,Yuzong Gao,Niansheng Huang,Lifu Lin,Shanghua Wu
The digital light processing (DLP)-based vat photopolymerization enables the fabrication of intricate silicon nitride (Si 3 N 4 ) components. However, challenges still persist in producing low-defect and high-performance ceramic parts at lower volume fractions. In this study, a new block copolymer was employed for the modification of Si 3 N 4 powders. The rheological behavior , dispersant mechanism, curing properties, printing performance of green body, mechanical properties and Weibull modulus of the sintered sample were systematically investigated. The results indicated that the modifier characterized by the long molecular chains and C C double bonds adhered successfully to the surface of Si 3 N 4 particles through hydrogen bonding , and the viscosity reduction effect of this modifier was ten times lower than that of the reported KH560 modifier. Besides, the synergistic dispersion effect achieved via the combination of the long chain modifier with a small molecular dispersant , facilitates the preparation of a 60 vol% (80.74 wt%) Si 3 N 4 slurry. Subsequently, the tightly bonded interlayer of the green body and the complex Si 3 N 4 sintered components with different volume fractions, high consistency and superb mechanical performance (the strength of 865.87 ± 54.35 MPa and the Weibull modulus of 18.49) were fabricated. These findings highlight the promising potential of the proposed modification approach for advancing the fabrication of high volume fraction and high-performance Si 3 N 4 components.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2019
·
IF 4.081
Keqiang Zhang,Rujie He,Guojiao Ding,Chengwei Feng,Weidong Song,Daining Fang
3Y-TZP strengthened ZrO 2 ceramics were fabricated by using digital light processing (DLP) based additive manufacturing . The effects of 3Y-TZP concentration on the relative density, linear shrinkage, microstructure, and mechanical properties of the DLP-prepared ZrO 2 ceramic were investigated in detailed. High precision ZrO 2 ceramic parts with lattice structure with parts were successfully prepared by using DLP. The highest relative density and flexural strength were 96.40% and 306.53 ± 6.03 MPa, respectively, when the 3Y-TZP concentration was 7.5 vol%. The strengthening mechanism was discussed in detailed.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yangyang He,Guocheng Ding,Ran Yu,Wenqiang Yan,Manwen Zhang,Renlong Liu,Lili Jiang,Jianquan Wang,Wei Huang
With the development of biomedical engineering, the preparation of hydrogels with combined extreme mechanical properties similar to those of some biological hydrogels becomes an important research topic for scientists. In this work, a single-network hydrogel with combined extreme mechanical properties is prepared through a simple and universal method, wherein the strength, elongation at break, toughness, and fracture energy of the hydrogel WPU-3PAAm-6PAN are achieved at 24.7 MPa, 544.0%, 68.9 MJ m–3, and 37.2 kJ m–2, respectively. Herein, a series of photosensitive resins in emulsion form are synthesized, and due to the water–oil diphasic characteristic, hydrophobic monomers and high-efficient hydrophobic photo-initiators are adopted into the resins, which can significantly improve the mechanical properties of the hydrogels due to the hydrophobic association effect and solve the biggest barrier of low curing rate in digital light processing (DLP) fabrication of hydrogels, respectively. Moreover, the simple and facile method to obtain robust and tough hydrogels can be universally applied to other polymer systems. Combined with the excellent mechanical properties and printing ability, the hydrogels with optimized structures are fabricated through DLP printing technology and applied as tendon substitutes. The tendon substitutes exhibit superior performance for mechanical connection and regeneration of collagen fibers. Although further clinical research is required, the hydrogels have great potential applications in various biological areas.
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Yanling Cheng,Haoxian Huang,Xinxin Xi,Yuqiang Deng,Hainan Zhang,Chengyong Wang,Huatay Lin
Al flake was used as the filler to optimize the properties of vinyl-polysilazane based photo-curable resin derived ceramics (P-PDCs) manufactured by digital light processing. Al flake addition showed a significant inhibitory effect on the macroscopic cracking and the micrometer voids of the P-PDCs. With the Al flake content of 0.6 wt%, P-PDCs pyrolysed at 1300 °C exhibited a maximum Vickers hardness and bending strength of 9.47 GPa and 89.39 MPa, respectively. The Nano-indentation measurements showed an improvement of the elastic modulus from 74.56 GPa to 85.62 GPa, and the indentation hardness from 7.12 GPa to 12.47 GPa as the increase of the Al flake. During pyrolyzing, the pristine Al flake reacted with the pyrolysed by-product obtained hollow lamellar Al 2 O 3 phase of varying aspect ratios in the forming matrix, which acted not only as a strengthening phase on the mechanical properties but also as a channel for the release of gaseous.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 1
·1-9
·
IF 20.1
Chen Cheng,Wang Xi,Wang Yan,Gu Hongxi,Zhao Weixing,Zhang Wenxiong,Sewvandi Galhenage Asha,Wang Bo,Ma Chunrui,Liu Ming,Hu Dengwei
Digital light processing (DLP) 3D printing technology is widely applied in the fabrication of ceramics owing to the good printing precision and printing speed. Barium titanate (BaTiO 3 , BT) has attracted extensive attention of researchers due to the good piezoelectric constant, strong dielectric constant, and ease of integration. Therefore, DLP 3D printing technology is combined with the production of BaTiO 3 /1,6-ethylene glycol diacrylate/Polyethylene glycol (400) diacrylate (BT/HDDA/PEG(400)DA) nanocomposites to improve the electrical properties. A preparation method for composite slurry with high fluidity, high solid content, and low viscosity is proposed by comparing the electrical properties of BT/HDDA/PEG(400)DA nanocomposite fabrication with different solid content. The work demonstrates that 67 wt% BT/HDDA/PEG(400)DA nanocomposites are better solid content to DLP 3D printing technology and the printed nanocomposite has the excellent electric properties. After a post-processing, the 67 wt% nanocomposite slurry shows the higher relative density (91.69%) and exhibits piezoelectric constant, remnant polarization, and dielectric constant of 151 pC/N, 17.4 μC/cm 2 , and 7712, respectively. The results suggest that the DLP 3D printing technology provides an alternative method for the fabrication of complex functionality nanocomposite piezoelectric elements. Graphical Abstract
研究领域:
材料科学
·
电气工程
·
制造技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Mei-Ling Yang,Guo-Xiang Zhou,Ning Xie,Kun-Peng Lin,Yan-Zhao Zhang,Zhe Zhao,Yun-Peng He,Yu-Hang Zhang,Zhi-Hua Yang,De-Chang Jia,Yu Zhou
Electronic 3D printing possesses a remarkable molding ability and convenience in integrated circuits, flexible wearables, and individual automobile requirements. However, traditional 3D printing technology still struggles to meet the demands of high precision and high efficiency in the process of fabricating a curved surface circuit, particularly achieving precise silver circuit molding on irregular substrates. Here, a high-precision and muti-scaled conformal manufacturing method for silver circuits is presented through the digital light processing (DLP) of ultraviolet-curable silver paste (UV-SP) with adjustable photocuring properties, enabling the successful preparation of micro-scaled conductive structure on the sharply skewed hook face. The minimum modeling depth and width of the cured silver paste can be well controlled to 10 and 88 µm, respectively. Compared with traditional printing technology, the printing efficiency of complex patterns has increased by over 70 %. The printed silver circuit demonstrates an exceptionally high electrical conductivity, reaching as high as 1.16 × 10 7 S/m. Additionally, the UV-SP exhibits significant manufacturing efficiency and superior molding resolution compared to conventional direct ink writing and inkjet printing techniques, thereby contributing to the attainment of high precision and efficiency of conformal and micro-molding manufacturing in sensors, communication antennas, and other electronic devices based on curved substrates.
研究领域:
电子制造
·
材料科学
·
3D打印技术
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 21
·期 5
·3128-3140
·
IF 1.8
Yang Wang,Zhuoqun Han,Qingxuan Zhou,Yongning Han,Lunan Bi,Xia Zhang,Xiang Lu,Jie Zhao,Wei Chu,Jian Li,Zhicheng Zhao,Yingying Wang,Ling Li,Futian Liu
Digital light processing (DLP) provides a promising avenue for constructing ceramic parts with high precision and complex shapes, yet the inherent brittleness and strength-toughness trade-off hinder their wide applications. Here, according to DLP 3D printing, the textured alumina ceramic components with horizontally aligned textured microstructure were successfully created by adding anisotropically shaped platelets. As a critical process in the preparation of textured ceramics, the alumina platelets were aligned horizontally during printing by using the special shear fields and forming capabilities of DLP technology. The shrinkage, density, microstructure, mechanical performance, and damage-tolerance behavior of alumina parts with different platelet concentrations were examined, and the toughening mechanisms were investigated. The strength and toughness of ceramics with 5 vol.% platelet addition are increased by 22% and 43%, respectively, as compared with those without platelets. The improved damage tolerance capabilities were primarily ascribed to the collaborative toughening mechanisms stimulated by the platelet addition, including crack branching, crack deflection, uncracked-ligament bridging, and platelet pull-out, which increased the crack tortuosity and consumed more fracture energy. The strategy opens up new opportunities to design complex 3D ceramic geometries with bio-inspired layered or textured architectures, providing optimized damage tolerance.
研究领域:
材料科学
·
制造工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）