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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 630 pages |
| ISBN: | 978-0-9879917-2-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Direct Production of Tungsten Carbide via the FFC - Cambridge Process
Diem-Hang Tran-Nguyen1; Derek Fray1;1UNIVERSITY OF CAMBRIDGE, Cambridge, United Kingdom;
Type of Paper: Regular
Id Paper: 458
Topic: 6
Abstract:
Tungsten carbide (WC) was produced via the electrochemical reduction of calcium tungstate (CaWO4) and carbon preforms in molten calcium chloride at 1173K. The products were characterised by X-ray diffraction analysis, scanning electron microscopy and energy dispersive X-ray analysis. It was observed that after 2-3h of polarisation, CaWO4 was fully reduced to form metallic tungsten, which subsequently reacted with carbon to form WC via the formation of W2C. The pure WC products obtained had nodular structure and hexagonal phase, and were typically 300–50nm in size.