Low infrared emissivity of a Ti3AlC2 MAX ceramic for high-temperature thermal camouflage

Thermal camouflage technology can effectively hide an object by lowering its infrared emissivity and reducing its surface temperature. So far, it has been a challenge to realize thermal camouflage at high-temperatures with a single material. Here, we report a Ti3AlC2 MAX phase material that exhibits...

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Bibliographic Details
Published inJournal of the European Ceramic Society Vol. 44; no. 10; pp. 5503 - 5515
Main Authors Fan, Xiachen, Li, Shibo, Zhang, Weiwei, Zhang, Xuejin, Mou, Junji
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.08.2024
Subjects
Infrared emissivity
MAX phases
Mechanism
Thermal camouflage
MAX phases
Thermal camouflage
Infrared emissivity
Mechanism
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Summary:Thermal camouflage technology can effectively hide an object by lowering its infrared emissivity and reducing its surface temperature. So far, it has been a challenge to realize thermal camouflage at high-temperatures with a single material. Here, we report a Ti3AlC2 MAX phase material that exhibits excellent thermal camouflage properties from room temperature to 500 °C, and maintains a low emissivity of 0.25 at 500 °C, which is difficult to achieve for most metals due to the rapid increase in emissivity caused by oxidation. The thermal camouflage mechanism of Ti3AlC2 was analyzed on the basis of experimental results and first-principles calculations, providing a feasible approach to select other MAX phases (such as Ti3SiC2, Cr2AlC, and Ti2AlC) with attractive thermal camouflage performance. Ti3AlC2 and other MAX phases are promising candidates for thermal camouflage applications due to their low emissivity, high-temperature stability, good oxidation resistance and ease of fabrication.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2024.03.043