High temperature absorbing coatings with excellent performance combined Al2O3 and TiC material |
| |
Affiliation: | 1. School of Materials Science and Engineering, Chang''an University, Xi''an 710064, China;2. State Key Laboratory for Mechanical Behavior of Materials, Xi''an Jiaotong University, Xi''an 710049, China;3. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000, China;4. Centre for Advanced Coating Technologies, University of Toronto, Toronto, M5S 3G8, Canada |
| |
Abstract: | A series of challenges are impeding the development of high temperature electromagnetic (EM) wave absorbing materials in x band. In this study, to deal with this problem, a coating, (1-x).wtAl2O3∼x.wtTiC, is designed and prepared using plasma spraying technology. Its permittivity increases with temperature and TiC content, which endows it with a good EM impedance at high temperature. The coating possesses excellent EM absorbing performance at 800 ℃. When the x value equals 0.2 and thickness 1.6 mm, the coating exhibits an EAB of 3.45 GHz at 800℃, and a reflection loss lower than -8 dB in whole x band. The XRD result shows that only two phases exist in the coating. The SEM images illustrate that TiC is unevenly dispersed in Al2O3, causing loss of conductivity and interface polarization. The finding not only broadens the application of TiC-based materials but also indicates the promising future of this material system. |
| |
Keywords: | EM absorbing material TiC material x band High temperature |
本文献已被 ScienceDirect 等数据库收录! |
|