Metal-ceramic microstructures in the Fe-Mn-O system - morphology control by impurity addition

R. Subramanian*, E. Ustundag, S. L. Sass, R. Dieckmann

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


The influence of the addition of impurities and changes in the oxygen partial pressure on the formation of metal-ceramic microstructures by partial reduction of ternary or higher ceramic oxides was experimentally investigated in the model system Fe-Mn-O at constant temperature and total pressure. Electron microscopy studies were performed for microstructural characterization, phase identification and chemical analysis. It was observed that the addition of dopants such as BaO, CaO, MgO, SrO, Al2O3, Cr2O3 or ZrO2 to the initial, polycrystalline oxide solid solution (Fe1-xMnx)1-ΔO strongly influences the location and rate of metal precipitation during reduction. Experimental observations are discussed based on solubility limits and the segregation of dopants.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 1995
Externally publishedYes
EventProceedings of the 1994 Fall Meeting - Boston, MA, USA
Duration: 28 Nov 19942 Dec 1994


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