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Short-carbon-fibers (Csf) reinforced Ti3SiC2 matrix composites (Csf/Ti3SiC2, the Csf content was 0 vol%, 2 vol%, 5 vol%, and 10 vol%) were fabricated by spark plasma sintering (SPS) using Ti3SiC2 powders and Csf as starting materials at 1300 ℃. The effects of Csf addition on the phase compositions, microstructures, and mechanical properties (including hardness, flexural strength (σf), and KIC) of Csf/Ti3SiC2 composites were investigated. The Csf, with bi-layered transition layers, i.e., TiC and SiC layers, were homogeneously distributed in the as-prepared Csf/Ti3SiC2 composites. With the increase of Csf content, the KIC of Csf/Ti3SiC2 composites increased, but the σf decreased, and the Vickers hardness decreased initially and then increased steadily when the Csf content was higher than 2 vol%. These changed performances (hardness, σf, and KIC) could be attributed to the introduction of Csf and the formation of stronger interfacial phases.


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Microstructure and mechanical properties of short-carbon-fiber/Ti3SiC2 composites

Show Author's information Guangqi HEa,bRongxiu GUOaMeishuan LIbYang YANGb,cLinshan WANGdYuhai QIANbJun ZUObJingjun XUb( )Changsheng LIUa( )
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
College of Science, Northeastern University, Shenyang 110819, China

Abstract

Short-carbon-fibers (Csf) reinforced Ti3SiC2 matrix composites (Csf/Ti3SiC2, the Csf content was 0 vol%, 2 vol%, 5 vol%, and 10 vol%) were fabricated by spark plasma sintering (SPS) using Ti3SiC2 powders and Csf as starting materials at 1300 ℃. The effects of Csf addition on the phase compositions, microstructures, and mechanical properties (including hardness, flexural strength (σf), and KIC) of Csf/Ti3SiC2 composites were investigated. The Csf, with bi-layered transition layers, i.e., TiC and SiC layers, were homogeneously distributed in the as-prepared Csf/Ti3SiC2 composites. With the increase of Csf content, the KIC of Csf/Ti3SiC2 composites increased, but the σf decreased, and the Vickers hardness decreased initially and then increased steadily when the Csf content was higher than 2 vol%. These changed performances (hardness, σf, and KIC) could be attributed to the introduction of Csf and the formation of stronger interfacial phases.

Keywords:

Ti3SiC2, short-carbon-fibers (Csf), spark plasma sintering (SPS), microstructure, mechanical properties
Received: 30 March 2020 Revised: 08 July 2020 Accepted: 13 July 2020 Published: 06 November 2020 Issue date: December 2020
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Publication history

Received: 30 March 2020
Revised: 08 July 2020
Accepted: 13 July 2020
Published: 06 November 2020
Issue date: December 2020

Copyright

© The Author(s) 2020

Acknowledgements

This work was supported by the Joint Fund of Liaoning- SYNL (Grant No. 2019JH3/30100035) and the Science and Technology Foundation of National Defense Key Laboratory (Grant No. HTKJ2019KL703006).

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