Method and apparatus for studying high-temperature properties of conductive materials in the interests of nuclear power engineering

Physical processes during a rapid (microsecond) heating of metals, carbon, and their compounds by a single pulse of electric current are discussed. Effects arising in such short-term heating near the melting point are noted: the electron emission and heat capacity anomalies and the possible occurren...

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Bibliographic Details
Published in:Physics of atomic nuclei 2016-12, Vol.79 (14), p.1637-1655
Main Authors: Savvatimskiy, A. I., Onufriev, S. V.
Format: Article
Language:English
Subjects:
Analysis
Anomalies
ATOMIC AND MOLECULAR PHYSICS
Blackbody
CARBON
ELECTRIC CURRENTS
Electromagnetic radiation
ELECTRON EMISSION
ELECTRONS
FRENKEL DEFECTS
HAFNIUM
HEATING
High temperature
INTERSTITIALS
MATERIALS SCIENCE
Melt temperature
MELTING POINTS
Methods
Nuclear energy
NUCLEAR ENGINEERING
Optics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Pulse heating
Solids Under Extreme Conditions
SPECIFIC HEAT
TEMPERATURE RANGE 0400-1000 K
ZIRCONIUM
Zirconium carbide
ZIRCONIUM CARBIDES
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Summary:Physical processes during a rapid (microsecond) heating of metals, carbon, and their compounds by a single pulse of electric current are discussed. Effects arising in such short-term heating near the melting point are noted: the electron emission and heat capacity anomalies and the possible occurrence of Frenkel pair (interstitial atom and vacancy). The problem of measuring the temperature using optical methods under pulse heating is considered, including the use of a specimen in the form of a blackbody model. The melting temperature of carbon (4800–4900 K) is measured at increased pulse pressure. The results of studying the properties of metals (by example of zirconium and hafnium) and of zirconium carbide at high temperatures are discussed. The schematics of the pulse setups and the instrumentation, as well as specimens for a pulse experiment, are presented.
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778816140131