Electrical conductivity of Al/sub 2/O/sub 3/:Fe + Y

Journal Article · Mon Dec 01 04:00:00 EST 1986 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1986.tb07389.x· OSTI ID:5740633

Koripella, C R; Kroger, F A

High-temperature dc electrical conductivity and emf of oxygen concentration cells with Al/sub 2/O/sub 3/ as the electrolyte were studied. The defect structure of ..cap alpha..-Al/sub 2/O/sub 3/ doped with Fe and Y was investigated to test an explanation proposed for the favorable effect of Y addition to super alloys (Fe, Cr, Ni, Al) which leads to well-adherent and nonconvoluted Al/sub 2/O/sub 3/ oxide scales. Results indicate that Y is a singly ionizable donor in Al/sub 2/O/sub 3/ and Y additions are effective in compensating Fe acceptors in Al/sub 2/O/sub 3/ at iron concentrations up to the solubility limit of Y.

• Research Organization: Dept. of Materials Science, Univ. of Southern California, Los Angeles, CA 90089-0241
• OSTI ID: 5740633
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 69:12; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CRYSTAL DEFECTS
CRYSTAL DOPING
CRYSTAL STRUCTURE
CURRENTS
DIRECT CURRENT
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROLYTES
IRON COMPOUNDS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SOLUBILITY
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS