Jacob, Thomas K and Pandit, Shashidhara S (1987) Spinel deoxidation equilibrium in the cobalt-manganese-aluminum-oxygen system: Experiment and modeling. In: International Journal for Materials Research/Zeitschrift für Metallkunde, 78 (9). pp. 652-656.
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The concentration and chemical potential of O in molten Co-Mn alloys equilibrated with (Co, Mn)$Al_2O_4$ spinel solid solns. and $\alpha-Al_2O_3$ were detected at 1873 K as a function of Mn concentration Compostion of the equilibrim spinel phase was detected by using electron probe microanal. The effect of Mn on the activity coefficient of O in liquid Co was derived. The deoxidation equilibrium was computed by using data on the activity coefficient of O and Mn in liquit Co, Gibbs energies of formation of pure spinels, and published interaction parameters. The activity-compn. relation for the spinel solid soln. was derived from a cation distribution model. The computations were in agreement with exptl. data only when the activity coefficient of Mn was taken as 0.22, rather than 0.154 suggested in the literature.
| Item Type: | Journal Article |
|---|---|
| Publication: | International Journal for Materials Research/Zeitschrift für Metallkunde |
| Publisher: | Hanser Publisher |
| Additional Information: | Copyright of this article belongs to Hanser Publisher |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 13 Jun 2008 |
| Last Modified: | 27 Aug 2008 13:26 |
| URI: | http://eprints.iisc.ac.in/id/eprint/14266 |
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