Stabilization of cubic zirconia with manganese oxide

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb04673.x· OSTI ID:6800967

Dravid, V P; Ravikumar, V ^[1]; Notis, M R; Lyman, C E ^[2]; Dhalenne, G; Revcolevschi, A ^[3]

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1. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
2. Lehigh Univ., Bethlehem, PA (United States). Dept. of Materials Science and Engineering
3. Univ. de Paris-Sud, Orsay (France). Lab. de Chimie des Solides

A directionally solidified eutectic (DSE) of MnO-ZrO[sub 2] has been investigated using a variety of electron optical techniques. It is found that considerable MnO goes into ZrO[sub 2] to form a substitutional solid solution. About 14 wt% of MnO is soluble in ZrO[sub 2] close to the eutectic temperature. The solubility of ZrO[sub 2] in MnO, however, is quite low, less than 0.50 wt%. Electron diffraction experiments indicate that ZrO[sub 2] (MnO) has the cubic fluorite structure. Diffuse scattering, similar to other cubic zirconias (e.g., CaO, MgO stabilized zirconia), is also observed in manganese-stabilized zirconia. Diffuse scattering indicates the presence of oxygen vacancies and thus confirms the defect nature of the fluorite structure. Electron energy loss spectrometry (EELS) fine structure analysis of the Mn L[sub 23] edge provided clear evidence that Mn is present as Mn[sup 2+] in Mn-stabilized cubic ZrO[sub 2].

• OSTI ID: 6800967
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:10; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DATA
EXPERIMENTAL DATA
INFORMATION
MANGANESE COMPOUNDS
MANGANESE OXIDES
METALLURGICAL EFFECTS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SOLIDIFICATION
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES