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    • Keywords


      Cr-Mn-O; alloy oxide equilibria; isopiestic technique

    • Abstract


      The phase boundaries of the Cr-Mn-O system have been investigated by alloy-oxide equilibria at 1173 and 1273 K and by isopiestic technique at 1323 K. The oxide phases which coexist in equilibrium with the Cr-Mn alloys are determined by x-ray diffraction studies. The results of the experiments indicate the presence of MnO in equilibrium with Mn-rich alloy whereas MnCr2O4 and Cr2O3 phases coexist with almost pure Cr. A three-phase equilibrium consisting of MnCr2O4 and MnO phases has been detected at the alloy composition XMn=0·252 at 1323 K. The composition of the alloy delineates the phase boundaries in the isothermal sections of the system. The results are interpreted by thermodynamic analysis of the Cr-Mn-O system using the data from the isopiestic measurements and those available in the literature.

    • Author Affiliations


      S Ranganathan1 J P Hajra1

      1. Department of Metallurgy, Indian Institute of Science, Bangalore - 560 012, India
    • Dates

  • Bulletin of Materials Science | News

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