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Research Article | Open Access

Microstructure and properties of nano-laminated Y3Si2C2 ceramics fabricated via in situ reaction by spark plasma sintering

Lin-Kun SHIa,bXiaobing ZHOUb( )Jian-Qing DAIa( )Ke CHENbZhengren HUANGbQing HUANGb
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
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Abstract

A nano-laminated Y3Si2C2 ceramic material was successfully synthesized via an in situ reaction between YH2 and SiC using spark plasma sintering technology. A MAX phase-like ternary layered structure of Y3Si2C2 was observed at the atomic-scale by high resolution transmission electron microscopy. The lattice parameters calculated from both X-ray diffraction and selected area electron diffraction patterns are in good agreement with the reported theoretical results. The nano-laminated fracture of kink boundaries, delamination, and slipping were observed at the tip of the Vickers indents. The elastic modulus and Vickers hardness of Y3Si2C2 ceramics (with 5.5 wt% Y2O3) sintered at 1500 ℃ were 156 and 6.4 GPa, respectively. The corresponding values of thermal and electrical conductivity were 13.7 W·m-1·K-1 and 6.3×105 S·m-1, respectively.

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Journal of Advanced Ceramics
Pages 578-586
Cite this article:
SHI L-K, ZHOU X, DAI J-Q, et al. Microstructure and properties of nano-laminated Y3Si2C2 ceramics fabricated via in situ reaction by spark plasma sintering. Journal of Advanced Ceramics, 2021, 10(3): 578-586. https://doi.org/10.1007/s40145-021-0459-0

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Received: 01 October 2020
Revised: 08 January 2021
Accepted: 12 January 2021
Published: 26 April 2021
© The Author(s) 2021

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