Ultrahigh strength printed ceramic lattices
Ultrahigh strength printed ceramic lattices
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超高强度印刷陶瓷晶格
DOI：
10.1016/j.jallcom.2019.05.117
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发表时间：
2019-08-15
影响因子：
6.2
通讯作者：
Cheng, Laifei
中科院分区：
文献类型：
--
作者：
Mei, Hui;Zhao, Ruoshi;Cheng, Laifei
采用光固化技术制备了比强度为39.7Nm/g、比刚度为1.435Nm/kg的陶瓷点阵，其强度和刚度分别比2Nm/g和0.03Nm/kg的不锈钢点阵高出许多。这些成果不仅使陶瓷晶格的应用不再局限于组织工程或过滤等新型功能材料领域，而且是结构陶瓷轻量化设计的一个实质性突破。本研究通过实验和模拟优化了陶瓷晶格的晶胞设计，并采用SiC渗透和热处理的方法对陶瓷晶格进行了强化。最终，加固网格的强度达到了比原始网格高出近7倍。此外，本文还对陶瓷点阵的压缩性能、断裂行为和微观特征进行了系统深入的研究。(C)2019 Elsevier B. V.版权所有。
Ceramic lattices with ultrahigh compressive specific strength, 39.7 Nm/g, and specific stiffness, 1.435 Nm/kg, have been fabricated by Stereo Lithography Apparatus (SLA) in this work, which are much stronger than stainless steel lattices, whose specific strength and stiffness are 2 N m/g and 0.03 Nm/kg respectively. These achievements not only make the application of ceramic lattices no longer limited in novel functional material field, like tissue engineering or filtration, but are also a substantial break-through on light-weight design of structural ceramics. In this study, the design of lattice unit cell was optimized through experiments and simulation, and then ceramic lattices were reinforced by infiltrating SiC and heat treating. Ultimately, the strength of reinforced lattices reached nearly 7 times higher than that of the primary ones. Besides, compressive properties, fracture behaviors and microscopic features of ceramic lattices were systematically and thoroughly discussed in this paper. (C) 2019 Elsevier B.V. All rights reserved.