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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3960

Title: Effect of C and milling parameters on the synthesis of WC powders by mechanical alloying
Authors: Bolokang, S
Banganayi, C
Pasha, M
Keywords: Mechanical alloying
Ab initio
XRD
WC
Tungsten-carbide
Refractrory metals
Carbon
Issue Date: 2009
Publisher: Elsevier
Citation: Bolokang S, Banganayi C, and Pasha M. 2009. Effect of C and milling parameters on the synthesis of WC powders by mechanical alloying. International Journal of Refractory Metals and Hard Materials, Vol. 28(2), pp 211-216
Abstract: In the current study, the amount of carbon and the effects of milling parameters in production of tungsten-carbide (WC) powder were evaluated. Mechanical alloying (MA) of elemental W and C powders at different carbon-rich and carbon-deficient compositions was studied. XRD results showed that the higher the carbon content the longer the milling period for the formation of WC powder. The authors also report on the effect of milling parameters on the phase formation. In stoichiometric composition, WC was synthesized faster than in compositions with higher carbon amount. Furthermore, W2C phase was observed in compositions with higher carbon content milled at low speed and ball-to-powder ratio (BPR), as well as in carbon-deficient composition milled for shorter period. The ab initio calculations were performed in attempt to explain the destabilization of W2C on further milling.
Description: Copyright: 2009 Elsevier. This is the author's post-print version. It is posted here by permission of Elsevier for your personal use. Not for redistribution. The definitive version was published in the International Journal of Refractory Metals and Hard Materials, Vol. 28(2), pp 211-216
URI: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TY1-4XCJ4PF-1-M&_cdi=5605&_user=958262&_pii=S0263436809001309&_orig=search&_coverDate=03%2F31%2F2010&_sk=999719997&view=c&wchp=dGLzVtz-zSkzk&md5=684b73efe83e2058372408f86c7296b5&ie=/sdarticle.pdf
http://hdl.handle.net/10204/3960
ISSN: 0263-4368
Appears in Collections:Nanotechnology
Metal and metal processes
Manufacturing science and technology
General science, engineering & technology

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