Journal of Manufacturing Processes
·
2022
·
IF 5.684
Xinghong Deng,Guangyu Zhang,Zhongwei Yu,Guangbin Shao,Longqiu Li
Additive manufacturing (AM) excels at building complex three-dimensional objects. With the help of support methods, macroscale non-assembly mechanisms can be built in a single step, eliminating complex and time-consuming assembly process. However, mesoscale non-assembly mechanisms built by AM are scarce for the lack of appropriate support methods. Projection stereolithography (PSL) is most fitted to manufacture mesoscale non-assembly mechanisms for its high resolution and high speed. Clearances in non-assembly mechanisms usually appear with internal overhang characteristic, requiring supports to be built successfully. However, traditional support structure in stereolithography cannot be fitted into these small internal gaps to achieve small clearances, which in turn prevents traditional stereolithography from fabricating mesoscale non-assembly mechanisms. A novel water-soluble support method is presented to overcome this restriction by incorporating water-soluble resin as support via custom-built multi-material PSL process . Internal overhangs and fragile overhangs can be built with fast support removal in mild release conditions. Mesoscale non-assembly mechanism with tight clearances is successfully fabricated. Material design, process parameters and approach to control material cross-contamination of this method are described. This support method may facilitate building functional mesoscale multi-material non-assembly mechanisms for miniaturized robotic applications .
研究领域:
机械工程
·
先进制造
✓ 已验证
DOI
高影响因子
Virtual and Physical Prototyping
·
2025
·
IF 8.8
Zhengda Chen,Dawei Fu,Xiangjun Zha,Huan Qi,Jigang Huang
Multi-material objects enable the integration of diverse properties and functionalities through precise three-dimensional material arrangement. Recent research highlights additive manufacturing as a pioneering approach for fabricating these complex structures, offering unprecedented control over spatial material distribution. However, it faces significant limitations when producing multi-material objects in the traditional layer-by-layer manner, as the approach requires frequent material switching, making the process prohibitively time-consuming. In this work, we present a two-step multi-material additive manufacturing strategy which achieves the fabrication of multi-material objects by capillary-driving the materials into the pre-printed framework and curing them with external energy sources. This strategy fundamentally eliminates the frequent material switching that occurs in traditional multi-material printing, thereby significantly enhancing the manufacturing efficiency of multi-material objects. Moreover, this strategy accommodates materials previously incompatible with conventional 3D printing. Tailored mechanical properties of multi-material structures can be achieved by adjusting the porosity and position of the framework. By adding stimulus-responsive materials into the multi-material structure, the strategy also enables 4D printing. This strategy opens a new avenue for the development of multi-material additive manufacturing.
研究领域:
增材制造
·
材料科学
·
三维打印
·
先进制造技术
✓ 已验证
产品关联
DOI
高影响因子
NATURE
·
2023
·Vol. 618
·期 7963
·63-68
·
IF 64.8
Song Tingting,Chen Zibin,Cui Xiangyuan,Lu Shenglu,Chen Hansheng,Wang Hao,Dong Tony,Qin Bailiang,Chan Kang Cheung,Brandt Milan,Liao Xiaozhou,Ringer Simon P.,Qian Ma
Titanium alloys are advanced lightweight materials, indispensable for many critical applications 1 , 2 . The mainstay of the titanium industry is the α–β titanium alloys, which are formulated through alloying additions that stabilize the α and β phases 3 , 4 , 5 . Our work focuses on harnessing two of the most powerful stabilizing elements and strengtheners for α–β titanium alloys, oxygen and iron 1 , 2 , 3 , 4 , 5 , which are readily abundant. However, the embrittling effect of oxygen 6 , 7 , described colloquially as ‘the kryptonite to titanium’ 8 , and the microsegregation of iron 9 have hindered their combination for the development of strong and ductile α–β titanium–oxygen–iron alloys. Here we integrate alloy design with additive manufacturing (AM) process design to demonstrate a series of titanium–oxygen–iron compositions that exhibit outstanding tensile properties. We explain the atomic-scale origins of these properties using various characterization techniques. The abundance of oxygen and iron and the process simplicity for net-shape or near-net-shape manufacturing by AM make these α–β titanium–oxygen–iron alloys attractive for a diverse range of applications. Furthermore, they offer promise for industrial-scale use of off-grade sponge titanium or sponge titanium–oxygen–iron 10 , 11 , an industrial waste product at present. The economic and environmental potential to reduce the carbon footprint of the energy-intensive sponge titanium production 12 is substantial.
研究领域:
材料科学
·
冶金工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guoqiang Zhou,Chaozheng Liu,Weimin Chen,Daotong Zhang,Hang Xiao,Tongtong Ma,Meichun Li,Changtong Mei
The rapid proliferation of portable smart electronics has significantly expanded the demand for flexible energy storage devices. Flexible supercapacitor (FSC), characterized by long lifetime, high power density, and portability, is an ideal power source for smart electronics. However, key challenges remain in developing robust, sustainable, and cost-effective electrode substrates and achieving rapid fabrication of FSCs with tailored electrode patterns. Herein, a mechanically strong wood-derived film is applied as the flexible substrate for stamping of Ti 3 C 2 T x inks to readily construct a high-performance in-plane FSC. The wood-derived film with a dense layered structure, high crystallinity, and fiber-oriented characteristics is prepared from natural vertical-section wood via cell wall softening engineering in combination with densification treatment, which exhibits excellent mechanical performance, flexibility, and foldability. By direct stamping Ti 3 C 2 T x inks on wood-derived film surface followed by drying, a flexible interdigitated electrode with stable electrical conductivity is achieved, enabling the rapid manufacturing of in-plane FSC. The developed FSC delivers favorable areal capacitance of 57.8 mF·cm −2 at 0.2 mA·cm −2 , and high energy density of 2.89 μWh·cm −2 at 60 μW·cm −2 . Furthermore, the FSC maintains stable capacitive behavior in the flexural state or after cyclic bending. Collectively, the integration of wood-derived film with Ti 3 C 2 T x inks for producing FSC via a stamping approach offers a sustainable strategy for the rapid manufacture of portable energy storage devices.
研究领域:
储能
·
材料科学
·
柔性电子学
·
纳米材料
·
可持续制造
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Ruiguang Chen,Qin Lian,Dichen Li,Xiaoning He,Shuaiwei Wang,Jian Zhuang
Diamond/SiC composites with high thermal conductivity are important materials for electronic industry, especially electronic packaging, but their complex structures and high-precision manufacturing are still challenging issues. Stereolithography-based manufacturing method combined with the reactive melt infiltration to make diamond/SiC composites with high-precision complex structures has been proposed in this paper. Diamond particles were used as the raw material, and as the particle size is a key factor affecting composite performance its influence was studied by means of measuring parameters, examining microstructure, and detecting components, whereas related mechanisms are discussed as necessary. Subsequently, a diamond/SiC composite with the thermal conductivity of 245.68 W/(m K) has been prepared and used in experiment. The experiment shows that the precision is affected by light-scattering and bending in the printing plane and in the vertical plane respectively, with the size errors of 0.25 and 0.12 mm.
研究领域:
材料科学
·
增材制造
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 22
·4028
·
IF 4.329
Chi Gong,Zhiyuan Kong,Xiaohong Wang
In three-dimensional (3D) bioprinting, the accuracy, stability, and mechanical properties of the formed structure are very important to the overall composition and internal structure of the complex organ. In traditional 3D bioprinting, low-temperature gelatinization of gelatin is often used to construct complex tissues and organs. However, the hydrosol relies too much on the concentration of gelatin and has limited formation accuracy and stability. In this study, we take advantage of the physical crosslinking of agarose at 35–40 °C to replace the single pregelatinization effect of gelatin in 3D bioprinting, and printing composite gelatin/alginate/agarose hydrogels at two temperatures, i.e., 10 °C and 24 °C, respectively. After in-depth research, we find that the structures manufactured by the pregelatinization method of agarose are significantly more accurate, more stable, and harder than those pregelatined by gelatin. We believe that this research holds the potential to be widely used in the future organ manufacturing fields with high structural accuracy and stability.Keywords:3D bioprinting;agarose;pregelatinization;organ manufacturing
研究领域:
生物工程
·
再生医学
✓ 已验证
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 3
·1107
·
IF 3.4
Hongling Bie,Honghao Chen,Lijun Shan,C. Y. Tan,M. S. H. Al-Furjan,S. Ramesh,Youping Gong,Y. F. Liu,R. G. Zhou,Weibo Yang,Honghua Wang
An ideal artificial bone implant should have similar mechanical properties and biocompatibility to natural bone, as well as an internal structure that facilitates stomatal penetration. In this work, 3D printing was used to fabricate and investigate artificial bone composites based on HA-ZrO2-PVA. The composites were proportionally configured using zirconia (ZrO2), hydroxyapatite (HA) and polyvinyl alcohol (PVA), where the ZrO2played a toughening role and PVA solution served as a binder. In order to obtain the optimal 3D printing process parameters for the composites, a theoretical model of the extrusion process of the composites was first established, followed by the optimization of various parameters including the spray head internal diameter, extrusion pressure, extrusion speed, and extrusion line width. The results showed that, at the optimum parameters of a spray head diameter of 0.2 mm, extrusion pressure values ranging from 1–3 bar, a line spacing of 0.8–1.5 mm, and a spray head displacement range of 8–10 mm/s, a better structure of biological bone scaffolds could be obtained. The mechanical tests performed on the scaffolds showed that the elastic modulus of the artificial bone scaffolds reached about 174 MPa, which fulfilled the biomechanical requirements of human bone. According to scanning electron microscope observation of the scaffold sample, the porosity of the scaffold sample was close to 65%, which can well promote the growth of chondrocytes and angiogenesis. In addition, c5.18 chondrocytes were used to verify the biocompatibility of the composite materials, and the cell proliferation was increased by 100% when compared with that of the control group. The results showed that the composite has good biocompatibility.Keywords:artificial bone;biomanufacturing;finite element analysis;biological scaffold
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Micromachines
·
2017
·Vol. 8
·期 7
·218
·
IF 1.833
Shuting Xie,Jun Wu,Biao Tang,Guofu Zhou,Mingliang Jin,Lingling Shui
One of the key fabrication steps of large-area microfluidic devices is the flexible-to-hard sheet alignment and pre-bonding. In this work, the vacuum airbag laminator (VAL) which is commonly used for liquid crystal display (LCD) production has been applied for large-area microfluidic device fabrication. A straightforward, efficient, and low-cost method has been achieved for 400 × 500 mm2microfluidic device fabrication. VAL provides the advantages of precise alignment and lamination without bubbles. Thermal treatment has been applied to achieve strong PDMS–glass and PDMS–PDMS bonding with maximum breakup pressure of 739 kPa, which is comparable to interference-assisted thermal bonding method. The fabricated 152 × 152 mm2microfluidic chip has been successfully applied for droplet generation and splitting.Keywords:large-area;microfluidic devices;fabrication;vacuum airbag laminator
研究领域:
生物工程
·
微纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Junjie Lu,Dong Wang,Keqiang Zhang,Suwen Li,Bin Zhang,Xueqin Zhang,Lu Zhang,Wenqing Wang,Ying Li,Rujie He
To obtain both plasticity and toughness of the material at the same time, various manufacturing techniques of ceramic-metal composites and structures have been studied. In this work, a bio-inspired Al 2 O 3 ceramic scaffold with Gyroid structure was designed and prepared by stereolithographic (SL) additive manufacturing , then the Al 2 O 3 /Al ceramic-metal hybrid structure was prepared by infiltrating molten Al into the Al 2 O 3 ceramic structure. The performances of the Al 2 O 3 ceramic scaffold and the Al 2 O 3 /Al ceramic-metal hybrid structure were compared and analyzed by a quasi-static compression experiment. The quasi-static compressive strength of the pristine Al 2 O 3 scaffold was 14.36 MPa, while that of the Al 2 O 3 /Al ceramic-metal hybrid structure was up to 89.06 MPa. Moreover, the plasticity of the Al 2 O 3 /Al ceramic-metal hybrid structure was much higher than that of the Al 2 O 3 scaffold. During compression, the Al 2 O 3 /Al ceramic-metal hybrid structure had excellent energy absorption, reaching up to 2569.16 KJ/m³, 15 times that of the Al 2 O 3 scaffold. Therefore, this method can obtain materials with excellent ductility and toughness.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mengyuan Yu,Guifen Fan,Yingkang Li,Xile Ling,Feng Gong,Gang Liu,Jiaming Bai,Mantian Li,Peng Zhou,Dongyang Zhang,Lining Sun
Achieving the synergy of low viscosity, high printing precision and enhanced curing ability for lead zirconate titanate (PZT) components is a critical issue in the field of digital light processing (DLP). Herein, the effect of calcination temperature on the morphology and grain size of PSNZT [(Pb 0 . 92 Sr 0 . 08 )(Zr 0 . 533 Ti 0 . 443 Nb 0.024 )O 3 ]ceramic powder has been investigated, and a lowest viscosity, higher printing precision and enhanced curing ability of PSNZT ceramic slurry has been achieved, resulting in a high piezoelectric constant (d 33 = 379pC/N) and a high dielectric constant (εr = 1308@100 KHz) via DLP process combined with following sintering densification (1220 °C/3 h).
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Zhengwei Li,Shun Li,Chongjian Gao,Juan Liu,Huawei Qu,Jirong Yang,William Weijia Lu,Changshun Ruan,Xufeng Niu
The scaffold that bioinspired natural bone-periosteum is ideal for the repair of bone defects, while the achievement of a gradient scaffold with an integrated and stable interface remains challenging. Herein, a bioinspired bone-periosteum integrated collagen-based scaffold is developed, in which the top layer is electrospun collagen-dense scaffold as bioinspired periosteum (BP) to prevent invasion of reticular fiber tissue and the bottom layer is in situ mineralized collagen scaffold (IMCS) to promote osteogenic differentiation. Owing to the proposed continuous manufacturing of successive 3D printing and electrospinning, the integrated scaffold (BP-IMCS) comprised of BP and IMCS demonstrates excellent structural stability, ten times higher than that of direct-combination scaffolds. Besides, in vivo implantation results confirmed that BP-IMCS significantly improves new bone formation up to 32.47%, better than an individual layer, due to its co-work of mineral ions and bioinspired structure. Therefore, this study offers a continuous manufacturing strategy to realize the integrated and interface-stable bone-periosteum structure, providing new solutions for heterostructure tissue fabrication.
研究领域:
生物材料学
·
组织工程学
·
再生医学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhongya Zhang,Lijuan Zhang,Guangwu Wen,Yongzhao Hou,Nannan Zhu,Cheng Zhong,Jing Xue,Chuncheng Wei,Shuang Li
In this paper, polysilazane photocurable slurry with low viscosity and excellent rheological properties was prepared with β-Si 3 N 4 filler. Digital light processing (DLP) technique was utilised to form green bodies through optimized printing parameters. It was found that the introduction of β-Si 3 N 4 filler reduced the shrinkage and improved the mechanical properties of the polysilazane derived SiCN ceramics. The flexural strength of the resulted ceramics reached a maximum of 253.0 ± 15.1 MPa while 20 wt% of β-Si 3 N 4 powder was added, and the fracture toughness increased to 3.1 ± 0.3 MPa m 1/2 at 30 wt% of the β-Si 3 N 4 powder addition. The shape of the introduced β-Si 3 N 4 particles were believed to be faveriable for uniform dispersion in the printing slurry without agglomeration. In the following pyrolysis treament the β-Si 3 N 4 powders promoted the release of gaseous products so that maintained the structure integrety of the printed parts and the rod-like β-Si 3 N 4 particles enhanced the energy dissipation during ceramic fracture. In this study, silicon-based composite of β-Si 3 N 4 /SiCN ceramics with excellent mechanical properties were prepared by DLP additive manufacturing technology, which confirmed the feasibility and the great potential of photo-curing additive manufacturing technology in the manufacturing of SiCN ceramic matrix composites with complex structures.
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
危险品化学品经营许可证（带存储）