Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 41, Issue -, Pages 402-407Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2013.05.014
Keywords
Molybdenum carbide; Mechanochemical synthesis; Reduction; Nanocrystalline
Funding
- Research Council of the University of Semnan
- University of Tehran
- Iran Nanotechnology Initiative Council
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Nanocrystalline molybdenum carbide (Mo2C) was synthesized from commercially pure MoO3 and graphite using high energy planetary ball milling and subsequent heat treatment. X-ray diffraction (XRD), differential thermal analysis/thermogravimetry (DTA/TG) and field emission scanning electron microscopy (FE-SEM) techniques were employed to evaluate powder particle characteristics. XRD results showed that during carbothermic reduction of MoO3, metallic molybdenum is formed as an intermediate phase before the carbide formation. Phase composition of the 20 h milled sample with 90% extra graphite after heat treatment at 1000 degrees C consists of nano-crystalline Mo2C with a mean crystallite size of 54 nm. (C) 2013 Elsevier Ltd. All rights reserved.
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