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High strength SiC whisker-reinforced Ti3SiC2 composites (SiCw/Ti3SiC2) with an improved thermal conductivity and mechanical properties were fabricated by spark plasma sintering. The bending strength of 10 wt% SiCw/Ti3SiC2 was 635 MPa, which was approximately 50% higher than that of the monolithic Ti3SiC2 (428 MPa). The Vickers hardness and thermal conductivity (k) also increased by 36% and 25%, respectively, from the monolithic Ti3SiC2 by the incorporation of 10 wt% SiCw. This remarkable improvement both in mechanical and thermal properties was attributed to the fine-grained uniform composite microstructure along with the effects of incorporated SiCw. The SiCw/Ti3SiC2 can be a feasible candidate for the in-core structural application in nuclear reactors due to the excellent mechanical and thermal properties.


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Fabrication of SiCw/Ti3SiC2 composites with improved thermal conductivity and mechanical properties using spark plasma sintering

Show Author's information Xiaobing ZHOUa,b( )Lei JINGaYong Duk KWONcJin-Young KIMcZhengren HUANGaDang-Hyok YOONb( )Jaehyung LEEb( )Qing HUANGa
Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
Union Materials Corporation, Daegu 42710, Republic of Korea

Abstract

High strength SiC whisker-reinforced Ti3SiC2 composites (SiCw/Ti3SiC2) with an improved thermal conductivity and mechanical properties were fabricated by spark plasma sintering. The bending strength of 10 wt% SiCw/Ti3SiC2 was 635 MPa, which was approximately 50% higher than that of the monolithic Ti3SiC2 (428 MPa). The Vickers hardness and thermal conductivity (k) also increased by 36% and 25%, respectively, from the monolithic Ti3SiC2 by the incorporation of 10 wt% SiCw. This remarkable improvement both in mechanical and thermal properties was attributed to the fine-grained uniform composite microstructure along with the effects of incorporated SiCw. The SiCw/Ti3SiC2 can be a feasible candidate for the in-core structural application in nuclear reactors due to the excellent mechanical and thermal properties.

Keywords: mechanical property, thermal conductivity, Ti3SiC2, spark plasma sintering, SiC whisker

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Publication history

Received: 23 March 2020
Revised: 19 May 2020
Accepted: 20 May 2020
Published: 09 July 2020
Issue date: August 2020

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© The Author(s) 2020

Acknowledgements

This study was supported by the National Natural Science Foundation of China (Grant Nos. 11975296 and 51811540402), the Natural Science Foundation of Ningbo City (Grant No. 2018A610001), and the Korea Ministry of Education (NRF-2018K2A9A2A06018203).

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