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Author Savvatimskiy, A. I. ♦ Onufriev, S. V.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ATOMIC AND MOLECULAR PHYSICS ♦ CARBON ♦ ELECTRIC CURRENTS ♦ ELECTRON EMISSION ♦ ELECTRONS ♦ FRENKEL DEFECTS ♦ HAFNIUM ♦ HEATING ♦ INTERSTITIALS ♦ MELTING POINTS ♦ NUCLEAR ENGINEERING ♦ SPECIFIC HEAT ♦ TEMPERATURE RANGE 0400-1000 K ♦ ZIRCONIUM ♦ ZIRCONIUM CARBIDES
Abstract 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 10637788
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-12-15
Publisher Place United States
Journal Physics of Atomic Nuclei
Volume Number 79
Issue Number 14


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