Ceramic and cermet targets
Use of isotopic materials as targets in high temperature environments, e.g., reactor cores, require that chemically stable forms of the isotopes be employed. Usually oxides are compatible with temperatures > 1600/sup 0/K, although some light element oxides exhibit some volatility at temperatures > 1300/sup 0/K. Especially in the case of heavy elements, the relatively low melting points of the metals, poor compatibility of the metals with encapsulation materials, and high chemical reactivity at moderate temperatures preclude the use of metal targets. However, encapsulation of ceramic targets has been successfully performed yielding high integrity samples. If hydrogen-reducible metals are mixed with the isotope(s), malleable, high strength, corrosion resistant targets can be rolled which contain a ceramic phase of isotope oxide. Isotope dilutions, additions of metals to form the metal matrix of a cermet target, and subsequent homogenization of all components are performed by dissolution in molten urea followed by calcination and compaction into the desired target form.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5373104
- Report Number(s):
- CONF-7910119-3; TRN: 80-008665
- Resource Relation:
- Conference: 8. annual conference of the I.N.T.D.S., Boston, MA, USA, 1 Oct 1979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
MAGNESIUM OXIDES
EXTRUSION
HOT PRESSING
NEUTRON DOSIMETRY
FABRICATION
PLUTONIUM DIOXIDE
CERAMICS
CERMETS
ENCAPSULATION
NEUTRON FLUX
NITRIC ACID
PLUTONIUM 239
POWDER METALLURGY
SINTERING
UREA
VANADIUM
WIRES
ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALINE EARTH METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
AMIDES
CARBONIC ACID DERIVATIVES
CHALCOGENIDES
COMPOSITE MATERIALS
DOSIMETRY
ELEMENTS
EVEN-ODD NUCLEI
HEAVY NUCLEI
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ISOTOPES
MAGNESIUM COMPOUNDS
MATERIALS
MATERIALS WORKING
METALLURGY
METALS
NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
PLUTONIUM ISOTOPES
PLUTONIUM OXIDES
PRESSING
RADIATION FLUX
RADIOISOTOPES
TRANSITION ELEMENTS
TRANSURANIUM COMPOUNDS
YEARS LIVING RADIOISOTOPES
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
440102 - Radiation Instrumentation- Radiation Dosemeters