Preparation and Characterization of Iron Manganese Carbide by Reaction of the Oxides and Carbon in Nitrogen

✍ Scribed by Yunchang Zhang; Donald M. Schleich

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 199 KB
• Volume: 110
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1994.1169

✦ Synopsis

(\mathrm{Fe}{2} \mathrm{O}{3}, \mathrm{Mn}{2} \mathrm{O}{3}), and their mixtures are reduced by carbon in nitrogen. The product depends on manganese loading. A cohenite li (\mathrm{c}{3} \mathrm{C}) type phase is stabilized by substituting manganese into the lattice. A single phase cohenite phase solid solution (\mathrm{Fe}{3-x} \mathrm{Mn}{x} \mathrm{C}) is prepared for (20-50 %) manganese loading, and a (\mathrm{Fe}{7} \mathrm{C}{3}) type phase can be obtained with manganese loading of (65-80 %). The nitrogen participates in the reduction of the manganese-rich oxide mixtures. A manganese carbonitride is obtained by heating the mixture of (\mathrm{Mn}{2} \mathrm{O}{3}) and carbon in nitrogen. The composition of the new compound is analyzed as (\mathrm{Mn}{2} \mathrm{C}{0.60} \mathrm{~N}{0.21}) and it has a hexagonal structure with (a_{0}=4.778 \AA) and (c_{0}=4.486 \AA). O 1994 Academic Press, inc.