Carbothermic reduction as a potential means for the direct production of Fe-WC and Fe-TaC, NbC metal-matrix composites
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The carbothermic reduction of wolframite and columbite ores has been studied as a means of direct production of Fe-WC and Fe-TaC/NbC composite materials. In both cases reduction with graphite at 1600°C produces a good dispersion of carbides in an austenitic iron matrix. Gangue oxide materials appear to separate, largely as a slag phase. Some residual porosity has however been found in the product materials.
KeywordsOxide Iron Polymer Porosity Graphite
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