Browsing by Author "Azubike, D.C."

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    • Kinetic dissociation of nickel titanate and nickel tungstate in oxygen potential gradients 

      Azubike, D.C.; Chrysanthou, A.; Terry, B.S. (1994-06-01)
      Nickel titanate (NiTiO) and nickel tungstate (NiWO) were exposed to oxygen potential gradients at 1400 and 1100° C, and they were found to dissociate into their constituent oxides, namely, NiO and TiO, and WO and NiO, ...

    • Reduction/carburisation of columbite concentrate 

      Terry, B.S.; Azubike, D.C.; Chrysanthou, A. (1994-06-01)
      The carbothermic reduction of columbite has been investigated at 1400°C utilising coal and graphite as alternative sources of carbon. Reduction to an iron-carbon matrix and NbC and TaC carbides occurs readily with complete ...