Additively manufactured bi-material metamaterial to program a wide range of thermal expansion
| Autor: | Yazhuo Wu, Xiaoyujie Xiao, Jiaxin Chen, Zhonggang Wang, Maojun Li, Kai Wei |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Fabrication Additive manufacture 02 engineering and technology Welding engineering.material 010402 general chemistry 01 natural sciences Polyvinyl alcohol Thermal expansion Negative thermal expansion law.invention chemistry.chemical_compound Metamaterial law lcsh:TA401-492 General Materials Science Composite material chemistry.chemical_classification Range (particle radiation) Mechanical Engineering Diamond Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Mechanics of Materials engineering Cellular material lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology |
| Zdroj: | Materials & Design, Vol 198, Iss, Pp 109343-(2021) |
| ISSN: | 0264-1275 |
| Popis: | The current research on bi-material diamond metamaterials, which can be used to program the coefficient of thermal expansion (CTE) over a wide range, mainly focuses on the theoretical design, while the corresponding experimental range of the CTEs is far narrower. In this study, a bi-material diamond metamaterial was additively manufactured using two polymers: nylon and polyvinyl alcohol (PVA). Without any need for extra processes such as bonding, welding, and mechanical fitting, the additively manufactured metamaterial integrated the nylon and PVA, providing an integrated fabrication process to ensure the expected programmable CTE. The experimentally measured CTEs agreed well with the theoretical predictions. When the material layout was selected as MAT-1 = PVA and MAT-2 = nylon, programmable CTEs ranging from 217.72 to 694.00 ppm/°C were obtained, which were larger than the CTEs of the nylon and PVA. When the material layout was MAT-1 = nylon and MAT-2 = PVA, even though both the nylon and the PVA had positive CTEs, a wide range of negative CTEs (varying from −25.02 to −369.01 ppm/°C) was obtained. The foregoing wide ranges of programmable CTEs are remarkably larger than the literature results, indicating the enhanced programmability of the bi-material metamaterial and stabilizing the foundation for the further design of multilevel and hierarchical metamaterials. |
| Databáze: | OpenAIRE |
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