MHD electrode development. Quarterly report for the period April-June 30, 1979

Technical Report · Wed Aug 01 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/5584815· OSTI ID:5584815

Sadler, J. W.; Bein, J.; Black, D. L.

Additional zirconia based electrode compositions have been identified as alternates for the non-slagging super-hot WESTF Test 42. Fabrication and processing details are presented for these alternate materials. Results are presented for slag compatibility tests of additional candidate ceramic insulating materials. Laboratory screening tests, electrochemical and anode arc erosion tests, have continued. Electrochemical corrosion tests of single and polycrystalline zirconia have been completed. The single crystal samples showed recession rates lower by a factor of 5 to 10 when compared with the polycrystalline samples. This data provides further support to the observation that grain boundaries act as sites for corrosion of these materials. Anode arc tests completed with copper samples showed that the highest copper erosion losses were associated with the K/sub 2/SO/sub 4/ slurry coating. Test planning and detailed experiment design activities have continued in support of the upcoming WESTF tests. As part of this activity plans are being implemented to add alternative test sections to the planned WESTF tests. Two additional test sections have been defined, a Materials Test Section and a Mini-WESTF Test Section. These test sections provide an opportunity to increase use of WESTF and to obtain critical data on the effects of the various MHD environments, including slag/seed chemistry, on candidate electrode and insulator materials.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (USA). Advanced Energy Systems Div.
• DOE Contract Number: AC01-79ET15529
• OSTI ID: 5584815
• Report Number(s): FE-15529-3
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300103* -- MHD Generators-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
CERAMICS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL-FIRED MHD GENERATORS
COATINGS
COMPATIBILITY
COPPER
CORROSION
CORROSION RESISTANCE
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
DATA
DIPPED COATINGS
DIRECT ENERGY CONVERTERS
ELECTRIC ARCS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CORROSION
ELECTRODES
ELEMENTS
EQUIPMENT
EROSION
GRAIN BOUNDARIES
INFORMATION
MATERIALS TESTING
METALS
MHD GENERATORS
MICROSTRUCTURE
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
POTASSIUM COMPOUNDS
POTASSIUM SULFATES
SCREENING
SLAGS
SULFATES
SULFUR COMPOUNDS
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES