Abstract
The work attempted to develop a kind of high temperature microwave absorption coating. The Ti3SiC2/NASICON composite coatings with different Ti3SiC2 concentrations were fabricated by atmospheric plasma spraying. The effect of Ti3SiC2 addition on phase, density, microstructure, dielectric property and microwave absorption property of as-sprayed coatings was investigated. Results show that the complex permittivity increases with increasing the content of Ti3SiC2 due to the enhanced space charge polarization, decreased porosity and increased conduction loss. When the content of Ti3SiC2 increases to 30 wt%, the coating exhibits the optimal microwave absorption property with a bandwidth (below − 5 dB) of 4.01 GHz and lowest reflection loss of − 12.4 dB at 9.63 GHz in 1.4 mm thickness. It indicates that the Ti3SiC2/NASICON composite coating can be a potential candidate for microwave absorption.
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