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压电式喷墨印刷中液滴喷射参数分析 总被引:4,自引:4,他引:0
油墨液滴体积大小是影响喷墨成像质量的直接因素,对喷墨印刷中液体喷射情况进行了分析与研究。以一套压电式喷液设备,进行了乙二醇液体的液滴喷射实验,观察并探讨了操作频率、脉冲时间、脉冲电压、脉冲形态等实验参数对液滴喷射过程的影响。实验表明:改变不同的参数会影响到液滴的形成机制,分别对每个参数进行观测,以求找到液滴喷射的最佳条件。 相似文献
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介绍了喷射成形技术在超高强铝合金、高比强度和高比模量铝合金、高硅铝合金、低膨胀和耐磨铝合金、耐热铝合金、颗粒增强铝基复合材料制备上的应用.与传统工艺(普通粉末冶金、铸造)相比,喷射成形技术在铝合金的制备上体现了很大的优越性和开发潜力. 相似文献
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董伟;刘苏磊;王旭东;许富民 《材料导报》2025,(3):171-179
脉冲微孔喷射法能够制备尺寸均一且热历史一致的单分散球形液滴及凝固粒子,在凝固理论研究、微电子封装、金属三维打印及粉末冶金等领域具有明显的优势。本文从脉冲微孔喷射法(POEM)的实验原理、装置以及模拟计算成果出发,综述了基于POEM所制备的未达到冷却凝固状态的微液滴在凸点沉积、3D打印、逐液滴雾化等方面的应用,以及基于POEM所制备的达到冷却凝固状态的微粒子在电子封装、核壳结构、金属玻璃等方面的应用,并进一步对现阶段脉冲微孔喷射法应用存在的问题以及发展前景进行了说明和展望。本综述可为单分散球形微滴及凝固微粒子相关领域以及凝固研究理论提供进一步的参考。 相似文献
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喷射成形技术及应用开发研究 总被引:2,自引:0,他引:2
喷射成形技术是一种快速凝固近终成形材料制备新技术,其最突出的创新点在于,把液态金属的雾化(快速凝固)和雾化熔滴的沉积(熔滴动态致密固化)自然地结合起来,在一步冶金操作中完成,以最少的工序,直接从液态金属制取具有快速凝固组织、整体致密、接近零件实际形状的高性能材料或半成品坯件。利用这项技术,不仅可以制备出许多高性能的新材料,而且可以大幅度提高传统材料的性能,同时又不明显地增加材料的制备成本,容易获得较高的产量,因此,喷射成形技术对于冶金材料制备行业来讲,有着广泛的适应性,是标志着材料制备技术更新换代的一种新型技术手段,在国际上,与半固态加工、薄板坯铸轧 相似文献
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Zhao X. Evans J. R. G. Edirisinghe M. J. Song J. H. 《Journal of Materials Synthesis and Processing》2001,9(6):319-327
A high performance, multinozzle, piezoelectric drop-on-demand ink-jet printer was used for solid freeforming of ceramics by direct, multiple-layer printing of suspensions of a commercially available powder. The wide-array print head was arranged over a single-axis stepper-motor driven table. Ceramic inks were prepared using low-polarity solvents to give low-ink conductivity and, hence, prevent corrosion of the electroding system in the print head. Zirconia inks were prepared in a high-energy bead mill charged with 500 m diameter zirconia media. The procedure for selecting solvent, dispersant, resin and their proportions is discussed in the context of print quality. The surface quality and fracture surfaces of three-dimensional (3-D) sintered zirconia test coupons were studied by microscopy. The fracture surfaces showed no sign of droplet relics and could not be used to detect the method of powder assembly. 相似文献
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Chengying Yin Xingyu Jiang Stephen Mann Liangfei Tian Bruce W. Drinkwater 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(26):2207917
The high throughput deposition of microscale objects with precise spatial arrangement represents a key step in microfabrication technology. This can be done by creating physical boundaries to guide the deposition process or using printing technologies; in both approaches, these microscale objects cannot be further modified after they are formed. The utilization of dynamic acoustic fields offers a novel approach to facilitate real-time reconfigurable miniaturized systems in a contactless manner, which can potentially be used in physics, chemistry, biology, as well as materials science. Here, the physical interactions of microscale objects in an acoustic pressure field are discussed and how to fabricate different acoustic trapping devices and how to tune the spatial arrangement of the microscale objects are explained. Moreover, different approaches that can dynamically modulate microscale objects in acoustic fields are presented, and the potential applications of the microarrays in biomedical engineering, chemical/biochemical sensing, and materials science are highlighted alongside a discussion of future research challenges. 相似文献
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Wenguang Yang Haibo Yu Gongxin Li Yuechao Wang Lianqing Liu 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(5)
3D hydrogel microstructures that encapsulate cells have been used in broad applications in microscale tissue engineering, personalized drug screening, and regenerative medicine. Recent technological advances in microstructure assembly, such as bioprinting, magnetic assembly, microfluidics, and acoustics, have enabled the construction of designed 3D tissue structures with spatially organized cells in vitro. However, a bottleneck exists that still hampers the application of microtissue structures, due to a lack of techniques that combined high‐throughput fabrication and flexible assembly. Here, a versatile method for fabricating customized microstructures and reorganizing building blocks composed of functional components into a combined single geometric shape is demonstrated. The arbitrary microstructures are dynamically synthesized in a microfluidic device and then transferred to an optically induced electrokinetics chip for manipulation and assembly. Moreover, building blocks containing different cells can be arranged into a desired geometry with specific shape and size, which can be used for microscale tissue engineering. 相似文献
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Sandra Petersmann Lukas Hentschel Joamin Gonzalez-Gutierrez Martin Tödtling Ute Schäfer Florian Arbeiter Muammer Üçal 《Advanced Engineering Materials》2023,25(7):2200225
Nowadays, personalized medical implants are frequently produced through additive manufacturing. As all medical devices have to undergo specific washing and sterilization before application, the effects of a predefined cleaning routine that is available to the clinical institutes, washing with chemical agent and formaldehyde fumigation, on the mechanical behavior of printed parts are examined. Mechanical properties of parts manufactured by fused filament fabrication (FFF) and ARBURG plastic freeforming (APF) using two poly(methyl methacrylate) (PMMA)-based materials, 3Diakon and CYROLITE MD H12, respectively, are analyzed using flexural and impact tests. An influence of cleaning treatments on the mechanical properties of APF samples is not detected. FFF samples, however, show lower impact strength after washing, but not after sterilization. The fracture surfaces, porosity values, or chemical structure assessed by Fourier-transform infrared (FTIR) spectroscopy could not explain this decrease. Influence of the cleaning treatments on the material itself is assessed using thin compression-molded specimens. The influence on the stress–strain curves is negligible, apart from a slight but significant reduction in the yield stress. FTIR spectroscopy and scanning electron microscopy analyses of the fracture surfaces do not show detectable differences among differentially treated samples. 相似文献
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Peter van Assenbergh Erwin Meinders Jo Geraedts Dimitra Dodou 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(20)
When designing a new nanostructure or microstructure, one can follow a processing‐based manufacturing pathway, in which the structure properties are defined based on the processing capabilities of the fabrication method at hand. Alternatively, a performance‐based pathway can be followed, where the envisioned performance is first defined, and then suitable fabrication methods are sought. To support the latter pathway, fabrication methods are here reviewed based on the geometric and material complexity, resolution, total size, geometric and material diversity, and throughput they can achieve, independently from processing capabilities. Ten groups of fabrication methods are identified and compared in terms of these seven moderators. The highest resolution is obtained with electron beam lithography, with feature sizes below 5 nm. The highest geometric complexity is attained with vat photopolymerization. For high throughput, parallel methods, such as photolithography (≈101 m2 h?1), are needed. This review offers a decision‐making tool for identifying which method to use for fabricating a structure with predefined properties. 相似文献