Electrical conductivity of dense Al, Ti, Fe, Ni, Cu, Mo, Ta, and W plasmas

Abstract

We report measurements of electrical conductivity of eight metals in the plasma state at densities ranging from 0.002 to 0.5 times solid density, and with internal energy from 2 to 30 kJ/gm. Data are presented as functions of internal energy and specific volume. Conductivity is observed to fall as the plasma expands for fixed internal energy, and for all but tantalum and titanium shows a minimum at approximately 0.01 times solid density, followed by an increase as the density decreases further.

The Thermophysical Properties of Iron Plasma

“…al. [6][7][8]. In these measurements the increase of conductivity due to the compression was observed.…”

“…The experimental data mentioned above were obtained along several isotherms [6][7][8] and several isochores [9,10]. We have chosen for the comparison the isotherm T = 10 kK and the isochore ρ = ρ n /6 = 1.312 g/cm 3 , where ρ n = 7.874 g/cm 3 is the Iron density under ambient conditions.…”

“…The temperature and densitie range, considered here, corresponds to the region, achieved in the isochoric experiments [9,10] and isothermal measurements [6][7][8]. In the latter case there are measurements of conductivity only.…”

“…We have checked this condition. It is fulfilled for T ≥ 10 kK and densities ρ ≤ 1 g/cm 3 , which corresponds to the area studied in [6][7][8]. The densities and temperatures reached in [9,10] are corresponds to E ≈1.…”

Evaluation of electrical conductivity of Cu and Al through sub microsecond underwater electrical wire explosion

“…Indeed, it was shown that during the explosion process, a thin (a few lm) layer of plasma is formed in the water adjacent to the boundary of the wire. 8,9 This plasma effectively screens the radiation from the wire boundary and, therefore, does not allow one to determine a true temperature using conventional visible spectroscopy. Hence, the EOS tables provide a method of determining the temperature indirectly.…”