Issue 2, 2013
From the journal:

RSC Advances

High temperature stable WC1−x@C and TiC@C core–shell nanoparticles by pulsed plasma in liquid†

Zhypargul Abdullaeva,a   Emil Omurzak,b   Chihiro Iwamoto,c   Hiroki Okudera,d   Michio Koinuma,e   Shintaro Takebe,b   Saadat Sulaimankulovaf  and  Tsutomu Mashimo*g  

* Corresponding authors

a Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan

b Priority Organization for Innovation and Excellence, Kumamoto University, Kumamoto, Japan

c Faculty of Engineering, Kumamoto University, Kumamoto, Japan

d Faculty of Natural System, Institute of Science and Engineering, Kanazawa University, Kanazawa, Japan

e Faculty of Applied Chemistry and Biochemistry, Kumamoto University, Kumamoto, Japan

f Institute of Chemistry and Chemical Technology, National Academy of Sciences, Chui pr. 267, Bishkek, Kyrgyzstan

g Shock Wave and Condensed Matter Research Center, Kumamoto University, Kumamoto, Japan
E-mail: mashimo@gpo.kumamoto-u.ac.jp
Fax: +81 96 342 3293
Tel: +81 96 342 3295

Abstract

High temperature phase tungsten carbide and titanium carbide coated with graphitic carbon (WC1−x@C and TiC@C) nanoparticles were synthesized by pulsed plasma in liquid. HRTEM results show that the average size of WC1−x@C and TiC@C nanoparticles are 30 and 35 nm, respectively. Raman spectroscopy revealed well-organized graphitic coatings, which make the nanoparticles stable at higher temperatures and resistant to oxidation. Refinement of the XRD profiles showed larger cell parameters compared to JCPDS cards. Furthermore, thermogravimetric analyses showed the higher thermal stability up to 601 and 543.4 °C, for the WC1−x@C and TiC@C nanoparticles, these are 43% and 36% more compared to the thermal stability of previously reported nanoparticles, which degraded at around 350 °C.

Graphical abstract: High temperature stable WC1−x@C and TiC@C core–shell nanoparticles by pulsed plasma in liquid

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Article information

DOI
https://doi.org/10.1039/C2RA22028H
Article type
Paper
Submitted
03 Sep 2012
Accepted
02 Nov 2012
First published
06 Nov 2012

RSC Adv., 2013,3, 513-519

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High temperature stable WC1−x@C and TiC@C core–shell nanoparticles by pulsed plasma in liquid

Z. Abdullaeva, E. Omurzak, C. Iwamoto, H. Okudera, M. Koinuma, S. Takebe, S. Sulaimankulova and T. Mashimo, RSC Adv., 2013, 3, 513 DOI: 10.1039/C2RA22028H

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