Synthesis and Electromagnetic Interference Shielding Performance of Ti3SiC2-Based Ceramics Fabricated by Liquid Silicon Infiltration

Xiaomeng Fan; Yuzhao Ma; Xiaolin Dang; Yanzhi Cai

doi:10.3390/ma13020328

Synthesis and Electromagnetic Interference Shielding Performance of Ti₃SiC₂-Based Ceramics Fabricated by Liquid Silicon Infiltration

Materials (Basel). 2020 Jan 10;13(2):328. doi: 10.3390/ma13020328.

Authors

Xiaomeng Fan¹, Yuzhao Ma^{1

2}, Xiaolin Dang¹, Yanzhi Cai²

Affiliations

¹ Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an 710072, China.
² College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.

Abstract

In this work, Ti₃SiC₂-based ceramics were fabricated by the infiltration of liquid silicon into TiC preform by incorporating a small amount of Al. Al can play a catalytic role to promote the formation of TiC twins before liquid silicon infiltration (LSI), which leads to the increase of transformation efficiency from TiC to Ti₃SiC₂ in the LSI process. When the Al content in the TiC preform increases to 9 wt.%, the volume content of Ti₃SiC₂ reaches 85 vol.%, revealing the high electromagnetic interference shielding effectiveness of 39 dB in the frequency range of 8.2-12.4 GHz. The results indicate that it is an effective way to synthesize Ti₃SiC₂-based ceramics with excellent electromagnetic shielding performance.

Keywords: Ti3SiC2; electromagnetic interference; liquid silicon infiltration (LSI); shielding effectiveness.

Abstract

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