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Article

Application of Additively Manufactured Pentamode Metamaterials in Sodium/Inconel 718 Heat Pipes

Laboratory of Aero-Thermal Protection Technology for Aerospace Vehicles, China Academy of Aerospace Aerodynamics, Beijing 100074, China
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Academic Editor: Konda Gokuldoss Prashanth
Materials 2021, 14(11), 3016; https://doi.org/10.3390/ma14113016
Received: 15 April 2021 / Revised: 18 May 2021 / Accepted: 29 May 2021 / Published: 2 June 2021
(This article belongs to the Special Issue Material Design and Defect Control for Metal Additive Manufacturing)
In this study, pentamode metamaterials were proposed for thermal stress accommodation of alkali metal heat pipes. Sodium/Inconel 718 heat pipes with and without pentamode metamaterial reinforcement were designed and fabricated. Then, these heat pipes were characterized by startup tests and thermal response simulations. It was found that pentamode metamaterial reinforcement did not affect the startup properties of sodium/Inconel 718 heat pipes. At 650–950 °C heating, there was a successful startup of heat pipes with and without pentamode metamaterial reinforcement, displaying uniform temperature distributions. A further simulation indicated that pentamode metamaterials could accommodate thermal stresses in sodium/Inconel 718 heat pipes. With pentamode metamaterial reinforcement, stresses in the heat pipes decreased from 12.9–62.1 to 10.2–52.4 MPa. As a result, sodium/Inconel 718 heat pipes could be used more confidently. This work was instructive for the engineering application of alkali metal heat pipes. View Full-Text
Keywords: heat pipes; pentamode metamaterials; sodium; Inconel 718; startup heat pipes; pentamode metamaterials; sodium; Inconel 718; startup
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MDPI and ACS Style

Hu, L.; Shi, K.; Luo, X.; Yu, J.; Ai, B.; Liu, C. Application of Additively Manufactured Pentamode Metamaterials in Sodium/Inconel 718 Heat Pipes. Materials 2021, 14, 3016. https://doi.org/10.3390/ma14113016

AMA Style

Hu L, Shi K, Luo X, Yu J, Ai B, Liu C. Application of Additively Manufactured Pentamode Metamaterials in Sodium/Inconel 718 Heat Pipes. Materials. 2021; 14(11):3016. https://doi.org/10.3390/ma14113016

Chicago/Turabian Style

Hu, Longfei, Ketian Shi, Xiaoguang Luo, Jijun Yu, Bangcheng Ai, and Chao Liu. 2021. "Application of Additively Manufactured Pentamode Metamaterials in Sodium/Inconel 718 Heat Pipes" Materials 14, no. 11: 3016. https://doi.org/10.3390/ma14113016

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