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首页> 外文期刊>Journal of Materials Processing Technology >Investigation on urea-formaldehyde resin as an in-powder adhesive for the fabrication of Al2O3/borosilicate-glass composite parts by three dimensional printing (3DP)
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Investigation on urea-formaldehyde resin as an in-powder adhesive for the fabrication of Al2O3/borosilicate-glass composite parts by three dimensional printing (3DP)

机译：尿素-甲醛树脂作为粉内胶粘剂的三维印刷（3DP）制造Al2O3 /硼硅酸盐玻璃复合件的研究

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摘要

Using adhesive to bond powdered material is the foundation of three dimensional printing (3DP), which necessitates the need for addressing problems with current 3DP adhesives, such as printhead blockage and complicated material preparation processes. To solve such problems, this paper introduces a novel in-powder adhesive of urea-formaldehyde (UF) resin, which can improve 3DP primarily via its high bonding strength, convenient material preparation and adhesive-free printing liquid. A self-developed 3DP machine tailored for this new adhesive, which features a low-cost commercial piezoelectric printhead, is also presented. A feasibility study was conducted with UF resin as the in-powder adhesive for 3DP fabrication of high-performance alumina/borosilicate-glass composites. Furthermore, the measurements taken throughout fabrication revealed that a double-smoothing (DS) layering method, capable of dispensing intact and thinner powder layers, resulted in better specimen properties. The Al2O3 green specimens obtained maximum tensile strength and flexural strength values of 9.5 MPa and 14.6 MPa, respectively. The green specimens were then sintered and infiltrated with borosilicate glass to form alumina/borosilicate-glass composites, which exhibited maximum values for tensile strength, flexural strength, compressive strength, Young's modulus, Vickers hardness and fracture toughness of 86.7 MPa, 200.7 MPa, 1503.4 MPa, 278.7 GPa, 14.1 GPa and 4.2 MPa m1/2, respectively. The composite also exhibited a low coefficient of thermal expansion (CTE) of 4.6 x 10(-6) degrees C-1. For demonstrational purposes, such composites, as rapid tools and functional parts, were also printed to show the technological potential in engineering applications. (C) 2014 Elsevier B.V. All rights reserved.
机译：使用粘合剂粘合粉末材料是三维打印（3DP）的基础，这需要解决当前3DP粘合剂的问题，例如打印头堵塞和复杂的材料制备过程。为了解决这些问题，本文介绍了一种新型的脲醛（UF）树脂粉内胶粘剂，该胶粘剂可以通过其高粘合强度，方便的材料制备和无胶印刷液来改善3DP。还介绍了针对这种新型粘合剂量身定制的自行开发的3DP机器，该机器具有低成本的商用压电打印头。用超滤树脂作为粉状胶粘剂进行3DP高性能氧化铝/硼硅酸盐-玻璃复合材料制造的可行性研究。此外，在整个制造过程中进行的测量结果表明，能够分配完整且较薄的粉末层的双平滑（DS）分层方法可带来更好的样品性能。 Al2O3生坯样品的最大抗拉强度和抗弯强度值分别为9.5 MPa和14.6 MPa。然后将生坯样品烧结并用硼硅酸盐玻璃渗透，以形成氧化铝/硼硅酸盐-玻璃复合材料，该复合材料的拉伸强度，弯曲强度，压缩强度，杨氏模量，维氏硬度和断裂韧性的最大值分别为86.7 MPa，200.7 MPa，1503.4 MPa，278.7 GPa，14.1 GPa和4.2 MPa m1 / 2。该复合材料还表现出4.6 x 10（-6）摄氏度C-1的低热膨胀系数（CTE）。出于演示目的，还印刷了这种复合材料，例如快速工具和功能部件，以展示其在工程应用中的技术潜力。 （C）2014 Elsevier B.V.保留所有权利。

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