ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Synthesis of Niobium Carbides from Ferroniobium by Mechanochemical Method
Junya KanoNobuaki SatoShigeru SuzukiFumio SaitoHidetaka SuginobeTakahiro Shiokawa
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2009 Volume 49 Issue 3 Pages 458-462


A feasible study on a novel production process of niobium carbide (NbC) from its low cost resource ferroniobium at low temperature was examined by means of mechanochemical and subsequent chemical separation method. NbC powders as well as metallic iron (Fe) were synthesized from ferroniobium (FeNb) and graphite (C) powders by using a planetary mill at milling speed of more than 600 rpm with FeNb : C molar ratio of 1 : 1. Then NbC particles were effectively separated from the mixed powders by leaching with HCl after the heat-treatment of the mixed powders in argon. These experimental results were consistent with the thermodynamic prediction.

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© 2009 by The Iron and Steel Institute of Japan
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