Manufacturing of stereolithographic 3D printed boron nitride nanotube-reinforced ceramic composites with improved thermal and mechanical performance
Manufacturing of stereolithographic 3D printed boron nitride nanotube-reinforced ceramic composites with improved thermal and mechanical performance
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DOI：
10.1088/2631-6331/acb12a
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发表时间：
2023-01
影响因子：
2.8
通讯作者：
M. Tank;Ana De Leon;Wentao Huang;Mitesh Patadia;Joshua Degraff;R. Sweat
中科院分区：
文献类型：
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作者：
M. Tank;Ana De Leon;Wentao Huang;Mitesh Patadia;Joshua Degraff;R. Sweat
氮化硼纳米管（BNNTs）具有高热稳定性、抗氧化性、良好的机械性能、高导热性和辐射屏蔽性，是高温多功能陶瓷纳米填料的理想选择。本文采用高温熔融法制备了含0.1 wt% BNNT的3D打印陶瓷纳米复合材料。采用三种不同的打印方向制备了样品，研究了打印层对BNNT添加对力学性能的影响。动态力学分析研究了纳米级增强剂对印刷陶瓷复合材料力学性能的长度效应，结果表明，仅添加0.1 wt%的BNNT，其抗弯强度可提高55%，抗弯模量可提高72%。通过激光闪光分析发现，添加bnnt后，陶瓷的热扩散率提高了63%。利用高分辨率显微镜观察了长径比纳米管的桥接和拉出效应。这种复合材料的建模和仿真方法对于虚拟测试和工业应用至关重要。了解纳米级合成填料对3D打印高温陶瓷的影响可以彻底改变未来的极端环境结构。
Boron nitride nanotubes (BNNTs) are the perfect candidate for nanofillers in high-temperature multifunctional ceramics due to their high thermal stability, oxidation resistance, good mechanical properties, high thermal conductivity, and radiation shielding. In this paper, 3D printed ceramic nanocomposite with 0.1 wt% of BNNT was prepared by fusing it at high temperatures. Samples were built with three different print directions to study the effect of print layers on mechanical performance along with BNNT addition. Dynamic mechanical analysis is performed to study the length effect of nanoscale reinforcements on the mechanical properties of the printed ceramic composites reporting significant improvements up to 55% in bending strength and 72% in bending modulus with just 0.1 wt% BNNT addition. A 63% thermal diffusivity improvement of ceramic by adding BNNTs is observed using laser flash analysis. The bridging and pull-out effect of nanotubes with a longer aspect ratio was observed with high-resolution microscopy. Such composites’ modeling and simulation approaches are crucial for virtual testing and industrial applications. Understanding the effect of nanoscale synthetic fillers for 3D printed high-temperature ceramics can revolutionize future extreme environment structures.