Additive and impurity distributions at grain boundaries in sintered alumina

Journal Article · Wed Jan 01 04:00:00 EST 1975 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1975.tb18764.x· OSTI ID:7296235

Johnson, W C ^[1]; Stein, D F

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1. Ford Motor Co., Dearborn, MI

Additive and impurity distributions at grain boundaries in sintered Al/sub 2/O/sub 3/ were determined using a scanning Auger microprobe, transmission electron microscopy, metallography, and electron probe analysis. The results indicated that Ca was present uniformly at the boundaries as a segregant, whereas the Mg or Ni levels observed resulted from nonequilibrium spinel particles. The Ca concentrations were consistent with equilibrium segregation theory and followed an equilibrium segregation isotherm. (auth)

• Research Organization: Ford Motor Co., Dearborn, MI
• OSTI ID: 7296235
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 58:11-12; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ADDITIVES
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CALCIUM
CHALCOGENIDES
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
DISTRIBUTION
ELECTRON MICROSCOPY
ELECTRON PROBES
ELEMENTS
GRAIN BOUNDARIES
IMPURITIES
ISOTHERMAL PROCESSES
MAGNESIUM
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALLOGRAPHY
METALS
MICROSCOPY
MICROSTRUCTURE
MINERALS
NICKEL
OXIDES
OXYGEN COMPOUNDS
PROBES
QUANTITY RATIO
SEGREGATION
SINTERED MATERIALS
SPINELS
TRANSITION ELEMENTS