Control of the morphology of metal-ceramic microstructures by impurity addition in the model system Fe-Mn-O

Conference · Tue Aug 01 04:00:00 EDT 1995

OSTI ID:77960

Subramanian, R; Uestuendag, E; Sass, S L; Dieckmann, R ^[1]

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1. Cornell Univ., Ithaca, NY (United States). Dept. of Materials Science and Engineering

Metal-ceramic multi-phase microstructures can be obtained by partial reduction of ternary or higher ceramic oxides. This subject was experimentally investigated in the model system Fe-Mn-O by reducing the oxygen partial pressure at constant temperature and total pressure. Electron microscopy studies were performed for microstructural characterization, phase identification and chemical analysis. The experimental observations are discussed based on solubility limits and the segregation of dopants. It is shown that the addition of dopants such as BaO, CaO, MgO, SrO, Al{sub 2}O{sub 3}, Cr{sub 2}O{sub 3} or ZrO{sub 2} to the initial, polycrystalline oxide solid solution (Fe{sub 1{minus}x}Mn{sub x}){sub 1{minus}{Delta}} strongly influences the location of metal precipitation during reduction.

• OSTI ID: 77960
• Report Number(s): CONF-950201--; ISBN 0-87339-283-3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BARIUM OXIDES
CALCIUM OXIDES
CHROMIUM OXIDES
COMPOSITE MATERIALS
DISLOCATIONS
ELECTRON MICROPROBE ANALYSIS
FABRICATION
GRAIN BOUNDARIES
IRON BASE ALLOYS
IRON OXIDES
MAGNESIUM OXIDES
MANGANESE ALLOYS
MANGANESE OXIDES
MICROSTRUCTURE
NUCLEATION
PHASE DIAGRAMS
PRECIPITATION
REDUCTION
SOLID SOLUTIONS
STRONTIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
ZIRCONIUM OXIDES