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Research Article | Open Access

Effect of multi-walled carbon nanotube addition on the microstructures and mechanical properties of Ti(C,N)-based cermets

P. WU( ), S. C. LIU, X. R. JIANG
College of Chemistry and Materials Science, Longyan University, Longyan 364000, China
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Abstract

The surface modification of multi-walled carbon nanotubes (MWCNTs) was carried out using plasma treatment. The microstructures of the prepared cermets with different additions of MWCNTs were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), and X-ray diffraction (XRD). Mechanical properties such as transverse rupture strength (TRS), fracture toughness (KIC), and hardness (HRA) were measured. The results showed that some reactive groups were successfully modified on the surface of MWCNTs, resulting in the improvement of dispersibility. Most of the amorphous carbons and impurities were peeled from the MWCNTs. Increasing MWCNT addition decreased the dissolution of tungsten, titanium, and molybdenum in the binder phase. The cermet with 0.5 wt% MWCNT addition showed the highest TRS and fracture toughness. The strengthening mechanisms were attributed to the finer grain size, the homogeneous microstructure, and the higher volume fraction of binder phase in the binder. The toughening mechanisms were characterized by bridging and pulling-out.

Keywords

Ti(C,N)-based cermetsmicrostructuremechanical propertyfracture toughness

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Journal of Advanced Ceramics
Volume 7 Issue 1,
March 2018
Pages 58-63
DOI: 10.1007/s40145-017-0256-y
Cite this article:
WU P, LIU SC, JIANG XR. Effect of multi-walled carbon nanotube addition on the microstructures and mechanical properties of Ti(C,N)-based cermets. Journal of Advanced Ceramics, 2018, 7(1): 58-63. https://doi.org/10.1007/s40145-017-0256-y

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Received: 19 December 2017
Accepted: 25 December 2017
Published: 20 January 2018
© The author(s) 2017

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/ by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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