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Structure design influencing the mechanical performance of 3D printing porous ceramics
Ceramics International ( IF 5.2 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.ceramint.2020.11.203
Hui Mei , Yuanfu Tan , Weizhao Huang , Peng Chang , Yuntian Fan , Laifei Cheng

Abstract Different from traditional ceramic materials, three-dimensional (3D) porous ceramics have become a research hotspot in recent years due to combinative of light-weight and high strength. Meanwhile, the 3D printing technique, which can be used to design hierarchical porous structures by combining flexible design and advanced manufacturing procedures, is regarded as a revolutionary and attractive tool for the preparation of 3D porous ceramics. Herein, a novel road is reported for fabricating 3D porous ceramic lattices with excellent mechanical properties by bridging 3D printing and SiC chemical vapor infiltration. The effects of coordination number, rotation angle, hollow structure and sintering temperature on the performance of ceramic lattices were also investigated. As revealed by the results, the cubic lattices possess the highest compressive strength and fracture work, 41.93 MPa and 2126.7 kJ/m2, respectively. Among different hollow lattices, the stability and bearing capacity of triangular structures were superior to that of square and honeycomb structures. The compressive strength of the triangular hollow lattices can reach up to 31.20 MPa. And the fracture work of the 3D porous lattices without rotation can be 7 times that of the lattices with a rotation angle of 30° and 45°. Moreover, as the sintering temperature rises, the compressive strength of 3D porous ceramics gradually increases while the shrinkage tends to be more serious. Additionally, the fracture work of 3D porous ceramics reaches its peak at a sintering temperature of 1400 °C. The approach developed in this work provides a simple, economic, and effective way to fabricate 3D porous ceramics, which leads to promising applications in future functional devices.

中文翻译:

影响3D打印多孔陶瓷力学性能的结构设计

摘要 与传统陶瓷材料不同,三维(3D)多孔陶瓷由于兼具轻质和高强度的特点,成为近年来的研究热点。同时,通过结合灵活的设计和先进的制造程序,3D打印技术可用于设计分层多孔结构,被认为是制备3D多孔陶瓷的革命性和有吸引力的工具。在此,报道了一种通过桥接 3D 打印和 SiC 化学气相渗透来制造具有优异机械性能的 3D 多孔陶瓷晶格的新方法。还研究了配位数、旋转角、空心结构和烧结温度对陶瓷晶格性能的影响。结果显示,立方晶格具有最高的抗压强度和断裂功,分别为 41.93 MPa 和 2126.7 kJ/m2。在不同的空心格子中,三角形结构的稳定性和承载力优于方形和蜂窝结构。三角形空心格子的抗压强度可达31.20 MPa。并且不旋转的3D多孔晶格的断裂功可以是旋转角度为30°和45°的晶格的7倍。而且,随着烧结温度的升高,3D多孔陶瓷的抗压强度逐渐增加,而收缩趋于更加严重。此外,3D 多孔陶瓷的断裂功在 1400 °C 的烧结温度下达到峰值。在这项工作中开发的方法提供了一种简单、经济、
更新日期:2020-11-01
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