| Autor: |
Adamchuk, Yu. O., Chushchak, S. V., Boguslavskii, L. Z., Sinchuk, A. V. |
| Zdroj: |
Surface Engineering & Applied Electrochemistry; Jun2023, Vol. 59 Issue 3, p281-289, 9p |
| Abstrakt: |
A series of electric explosions were carried out on single and twisted conductors of various diameters made of titanium (Ti) and tungsten (W) in propane-butane. Analysis of the electro-physical characteristics of the explosion showed that the process of resistive heating of the conductors is characterized by two monotonically increasing sections on the voltage and current curves, separated by a flat segment (plateau), which corresponds to a relatively stable specific electrical resistance of refractory metals in a liquid state. The energy introduced into the conductor during the resistive heating stage, which can be higher or lower than the energy of sublimation of the conductor and can be regulated by changing the external parameters of the discharge circuit, is a key indicator that determines the structural-phase state of the destruction products and the chemical interaction of the conductor. Conditions were realized under which micro- and nanosized powder products of the electric explosion do not contain residual metals and consist entirely of carbide phases (TiC with an average microhardness of 29 580 MPa in the explosion of titanium conductors, and a mixture of W2C + WC1 – x dominated by stabilized high-temperature nonstoichiometric cubic carbide WC1 – x with an average microhardness of 16 770 MPa in the explosion of tungsten conductors). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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