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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Barin I and Knacke O 1973Thermochemical properties of inorganic substances (Berlin: Springer Verlag)
Barin I, Knacke O and Kubaschewski O 1977Thermochemical properties of inorganic substances (Berlin: Springer Verlag) Supplement
Busch D H 1980Inorganic synthesis (New York: John Wiley) Vol. 20
Chase M W, Wrnutt J L, Prophet H and Mcdonald R A 1975J. Phys. Chem. Ref. Data 4 92
Eremenko V M, Lukashenko G M and Sidorko V R 1968Russ. J. Phys. Chem. 42 343
Jacob K T 1985Z. Metallkde 76 415
Venkataraman M and Neuman J P 1986Bull. Alloy Phase Diagrams 7 457
Vogel A I 1969Quantitative inorganic chemistry (London: ELBS & Longman)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ranganathan, S., Hajra, J.P. Alloy oxide equilibria in the Cr-Mn-O system. Bull. Mater. Sci. 9, 149–158 (1987). https://doi.org/10.1007/BF02744295
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02744295