粘合剂喷射模拟与镁合金粘合机理分析。

IF 2.3 4区 工程技术 Q3 ENGINEERING, MANUFACTURING
3D Printing and Additive Manufacturing Pub Date : 2024-04-01 Epub Date: 2024-04-16 DOI:10.1089/3dp.2022.0252
Qiang Yang, Mei Li, Ze Zhao, Ximeng Liao, Junchao Li
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引用次数: 0

摘要

粘合剂喷射(3DP)是一种在常温和大气环境下进行的添加剂制造,可以降低镁合金成型的风险。镁合金粉末通过粘结剂粘结成一定的结构,因此合适的粘结剂在 3DP 中非常重要。本研究根据镁合金的特点,采用了一种简单易得的水性低分子醇粘结剂,以降低镁合金 3DP 的难度。此外,我们还利用 COMSOL Multiphysics 仿真软件建立了粘结剂运动和沉积过程的仿真模型。结果表明,喷射速度的增加会提高液滴的质量和饱和度。更重要的是,射流速度越大,粘结剂液滴撞击粉末床后的铺展宽度就越大,这严重影响了绿色零件的尺寸精度。此外,较低的粘合剂饱和度会削弱颗粒间结合颈的形成,无法形成稳定的结构。此外,我们还分析了粘结剂与镁合金粉末的结合反应物,这些反应物最终会分解成氧化镁,实验结果表明最终烧结的样品具有相当好的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simulation of Binder Jetting and Analysis of Magnesium Alloy Bonding Mechanism.

Binder jetting (3DP) is a kind of additive manufacturing at room temperature and atmospheric environment, which can reduce the risk of magnesium alloy forming. Magnesium alloy powder is bonded to a certain structure by a binder, so the appropriate binder is very important in 3DP. In this study, according to the characteristics of magnesium alloy, a simple and easy-to-obtain water-based low-molecular alcohol binder was used to reduce the difficulty of magnesium alloy 3DP. Additionally, we use COMSOL Multiphysics simulation software to establish a simulation model of the movement and deposition process of the binder. The results show that the increase in jet velocity will increase the quality and saturation of droplets. More importantly, the larger the jet velocity is, the larger the spreading width of the binder droplet after impacting the powder bed, which seriously affects the dimensional accuracy of the green part. In addition, lower binder saturation will weaken the formation of interparticle bonding neck and cannot form a stable structure. Furthermore, we analyzed the bond reactants of the binder and magnesium alloy powder, which eventually decompose into MgO, and the experimental results show that the final sintered sample has considerable performance.

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来源期刊
3D Printing and Additive Manufacturing
3D Printing and Additive Manufacturing Materials Science-Materials Science (miscellaneous)
CiteScore
6.00
自引率
6.50%
发文量
126
期刊介绍: 3D Printing and Additive Manufacturing is a peer-reviewed journal that provides a forum for world-class research in additive manufacturing and related technologies. The Journal explores emerging challenges and opportunities ranging from new developments of processes and materials, to new simulation and design tools, and informative applications and case studies. Novel applications in new areas, such as medicine, education, bio-printing, food printing, art and architecture, are also encouraged. The Journal addresses the important questions surrounding this powerful and growing field, including issues in policy and law, intellectual property, data standards, safety and liability, environmental impact, social, economic, and humanitarian implications, and emerging business models at the industrial and consumer scales.
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