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Molecules 2019, 24(1), 16; https://doi.org/10.3390/molecules24010016

Synthesis of Chromium Carbide Nanopowders by Microwave Heating and Their Composition and Microstructure Change under Gamma Ray Irradiation

College of Materials Science and Engineering, Henan University of Technology, Henan 450001, China
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Author to whom correspondence should be addressed.
Academic Editor: John Spencer
Received: 3 November 2018 / Revised: 11 December 2018 / Accepted: 16 December 2018 / Published: 20 December 2018
(This article belongs to the Special Issue Microwave-mediated Chemistry)
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Abstract

Chromium carbide nanopowders were synthesized by mechanical alloying-assisted microwave heating. The effect of gamma irradiation on phase composition and microstructure of chromium carbide nanopowders synthesized by the microwave heating method was analyzed. The samples were characterized by X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM) techniques. The results showed that well-dispersed chromium carbide nanopowders can be synthesized by maintaining the temperature at 1000 °C for 1 h. Gamma ray irradiation had an important effect on the microstructure of chromium carbide nanopowders. The interplanar spacings of chromium carbide (110) crystal faces before and after gamma ray irradiation were 0.3725 nm and 0.3824 nm, respectively. The crystal structure of chromium carbide was changed by gamma ray irradiation. Gamma ray irradiation can also increase the binding energy of chromium carbide, which is beneficial to improve the thermal stability and mechanical properties of chromium carbide at high temperature. View Full-Text
Keywords: microwave heating; gamma irradiation; HRTEM; microstructure; chromium carbide microwave heating; gamma irradiation; HRTEM; microstructure; chromium carbide
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Jin, K.; Jia, Y.; Zhao, Z.; Song, W.; Wang, S.; Guan, C. Synthesis of Chromium Carbide Nanopowders by Microwave Heating and Their Composition and Microstructure Change under Gamma Ray Irradiation. Molecules 2019, 24, 16.

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