Title of Paper:Application of ZrB2 thin film as a low emissivity film at high temperature

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Affiliation of Author(s):[1] State Key Laboratory of Electronic Thin Films and Integrated Devices, National Engineering Research Center of Electromagnetic Radiation Control Materials, Key Laboratory of Multi-spectral Absorbing Materials and Structures of Ministry of Education, University of Electronic Science and Technology of China, Chengdu, 610054, China; [2] School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China; [3] State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

Journal:Applied Surface Science

Key Words:Hypersonic vehicles - Thermal conductivity - Cutting tools - High temperature applications - Borides - Zirconium - Electromagnetic wave emission - Zirconium compounds - Annealing

Abstract:Zirconium diboride exhibits high thermal conductivities and high melting point, which are beneficial for use in extreme environments. Examples including cutting tools, high-temperature electrodes and leading edges of hypersonic space vehicles. However, there is limited literature on the infrared properties of ZrB2 thin films. In this study, we report the results of infrared emissivity of sputter-deposited films and post-annealed films. X-ray diffraction shows promoted crystalline quality and grains growth for ZrB2 films with the increasing annealing temperature and time. The thin film exhibits high thermal stability and a low infrared emissivity of 0.01 (8 ~ 14 μm) after annealed at 1000℃ for 10 h. Besides, with an increase in annealing temperature and annealing time, film densification and grains growth were observed, leading to decrease of electrical resistivity and infrared emissivity. ? 2020 Elsevier B.V.

Document Type:Journal article (JA)

Volume:527

ISSN No.:01694332

Translation or Not:no