Ceramic materials for nuclear thermionic converters
The development and fabrication of ceramic-to-metal seals for thermionic converters which will operate in the temperature range of 700 to 1200 deg C are reported. Two ceramic-to-metal seal combinations were developed which show promise for specialized applications. For operation in an oxidizing atmosphere near 700 deg C, magnesia and nickel appear to be a good combination. Seals operating near 1200 deg C, if an oxidizing atmosphere is not present, may be composed of niobium and alumina with palladium serving as the brazing filler. The tungsten metallizing of alumina which contains yttria is a process which appears to have considerable merit. A reaction between the tungsten and yttria is thought to result in an improved ceramic-metal bond. (N.W.R.)
- Research Organization:
- Los Alamos Scientific Lab., Los Alamos, NM (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- W-7405-ENG-36
- NSA Number:
- NSA-17-034365
- OSTI ID:
- 4678965
- Report Number(s):
- LADC--5598; CONF-50--1; AED-Conf--1963-046-9
- Country of Publication:
- United States
- Language:
- English
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High-temperature ceramic-to-metal seal development
A STUDY OF THE COMPATIBILITY OF THERMIONIC CONVERTER MATERIALS WITH CAESIUM
Related Subjects
BONDING
BRAZING
CEMENTS
CERAMICS
CHEMICAL REACTIONS
EFFICIENCY
FABRICATION
HIGH TEMPERATURE
MAGNESIUM OXIDES
METALS
METALS, CERAMICS, AND OTHER MATERIALS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
NICKEL
NIOBIUM
OXIDATION
PALLADIUM
SEALS
THERMIONICS
TUNGSTEN
YTTRIUM OXIDES