Kia Dastani , Mohammad R. Movahhedy , Saeed Khodaygan , Micheal Yu Wang , Hongyu Yu
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引用次数: 0
Abstract
Traditionally synthesized ceramic aerogels possess a random internal configuration, which leads to poor mechanical properties. One effective strategy to address this issue is through architected design. This research explores a bottom-up synthesis approach to fabricate ceramic aerogels with an engineered internal configuration. The architected design specifically means creating periodic cellular structures with defined unit-cells. In this work, nano-architected ceramic aerogels composed of a 50–200 nm Al2O3 film with a relative density of 1.5–6 % are fabricated. A seamless shell-based configuration is employed, diverging from previous works that utilized hollow-tube designs. Due to their slender nature, these nanostructured ceramics are prone to instability failure and are sensitive to manufacturing imperfections. The most critical imperfection in this fabrication process is the geometric deviation between the designed model and the final fabricated structure. This research studies the nature and extent of these geometric deviations and investigates their impact on mechanical performance. The results indicate that the strength of the nano-architected aerogels in this study is significantly higher than that of conventional aerogels and those with hollow-tube designs.
期刊介绍:
The European Journal of Mechanics endash; A/Solids continues to publish articles in English in all areas of Solid Mechanics from the physical and mathematical basis to materials engineering, technological applications and methods of modern computational mechanics, both pure and applied research.