Synthesis of Vanadium Carbide by Mechanical Activation Assisted Carbothermic Reduction
2020 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 13, no 19, article id 4408
Article in journal (Refereed) Published
Abstract [en]
Vanadium carbide is known, for its hardness and other unique properties, as a refractory material. The synthesis of vanadium carbide is always associated with the utilization of expensive active metals, such as aluminum, calcium and magnesium, as a reducing agent to extract the vanadium metal from its corresponding oxide, followed by carbidization. The carbidization of reduced vanadium requires a complicated process and elevated temperature. Mechanical activation to synthesize vanadium carbide from its corresponding oxide and carbon source represents a promising, straightforward and less energy-intensive route. In the present study, vanadium carbide is synthesized by the carbothermic reduction of a mechanically activated mixture of V2O5 and carbon black as reducing agents without any additives. The reduction process is monitored by means of thermogravimetric analysis. The reduction products are characterized by X-ray diffraction and field emission scanning electron microscope. It is found that V8C7 with an average crystallite size of 88 nm can be synthesized from a V2O5-C mixture after milling for 15 h and further heating at 1050 °C for 1 h in an inert atmosphere.
Place, publisher, year, edition, pages
MDPI, 2020. Vol. 13, no 19, article id 4408
Keywords [en]
mechanical activation, carbothermic reduction, vanadium oxide, carbon black, vanadium carbide
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-81095DOI: 10.3390/ma13194408ISI: 000586723400001PubMedID: 33023271Scopus ID: 2-s2.0-85093967177OAI: oai:DiVA.org:ltu-81095DiVA, id: diva2:1475098
Note
Validerad;2020;Nivå 2;2020-10-12 (alebob)
2020-10-122020-10-122020-11-26Bibliographically approved