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High temperature absorbing coatings with excellent performance combined Al2O3 and TiC material.
- Source :
-
Journal of the European Ceramic Society . May2020, Vol. 40 Issue 5, p2013-2019. 7p. - Publication Year :
- 2020
-
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).wtAl 2 O 3 ∼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 Al 2 O 3 , 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 40
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 141635910
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2020.01.036