Open AccessЗакономерности образования карбидов титана и вольфрама из продуктов электровзрывного разрушения проводников
Author(s) -
Ю. О. Адамчук,
AUTHOR_ID,
С. В. Чущак,
Л. З. Богуславский,
А. В. Синчук,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2021
Publication title -
èlektronnaâ obrabotka materialov
Language(s) - English
Resource type - Journals
eISSN - 2345-1718
pISSN - 0013-5739
DOI - 10.52577/eom.2021.57.6.50
Subject(s) - materials science , tungsten carbide , sublimation (psychology) , tungsten , composite material , electrical resistivity and conductivity , indentation hardness , electrical conductor , heating element , titanium , metallurgy , analytical chemistry (journal) , electrical engineering , psychology , microstructure , chemistry , chromatography , psychotherapist , engineering
A series of electrical explosions in propane-butane of single and strand-connected Ti and W conductors with various diameters was carried out. Electrophysical characteristics of the explosion revealed that resistive heating of conductors is characterized by two monotonically ascending sections on the voltage – current curves separated by a flat segment (plateau), which corresponds to relatively stable electrical resistivity of refractory metals in the liquid state. The energy deposited by changing the power input into the conductor during its resistive heating, which can be higher or lower than its sublimation energy and can be regulated by changing the external adjustable parameters of the discharge circuit, is a key indicator determining the structural-phase state of destructed and chemically synthesized products after the explosion. The conditions are achieved under which micro- and nano-sized powder products do not contain residual metals and consist of carbide phases completely (TiC with an average microhardness of 29580 MPa as a result of the titanium explosion and a mixture of W2C+WC1-х, in which stabilized high-temperature non-stoichiometric cubic carbide WC1-x dominates, with an average microhardness of 16770 MPa as a result of tungsten explosion).