Measurement of the electrical resistivity of liquid 32G2 and 32G1 steels by the rotating magnetic field method

VISCOSITY AND ELECTRICAL RESISTIVITY OF LIQUID CuNiAl, CuNiAlCo, CuNiAlCoFe ALLOYS OF EQUIATOMIC COMPOSITIONS

“…Also the increasing of components quantityin the alloy leads to a decreasing of the temperature coefficient of the resistivity (in cooling moda). A similar result was obtained earlier whenthe measuring electrical resistivity of liquid steel [18,20]. As microheterogeneity is destroyed and components are mixed on an atomic scale in a liquid alloy, the number of conduction electrons z increases and, consequently, Fermi wave number kF = (3π 2 z/Ω) 1/3 , where Ω is the crystallite volume.…”

“…Isothermal holding at the measurement points was at least 15 minutes. The electrical resistivity was measured using the unit described in [18]. The estimation of the error in the measurementof resistivity by the technique described in [1] showed that the total relative error was about 3% when using BeO crucibles.…”

“…According to the Ziman theory, the temperature coefficient of resistivity is close to zero or negative in the region where 2kF = Kp, since the height of the first structure factor peak decreases with increasing temperature.It is remarkable that the 2kF=Kp condition is the basis of the Nagel-Tauc model which explains the high tendency of eutectic alloys to supercooling and the glass transition. According to this model when the condition 2kF = Kp is fulfilled, a potential barrier appears fornucleation of crystallite, the melting temperature (eutectic temperature) of the alloy decreases, and the glass transition temperature increases [18,20]. An increase in the supercooling of a liquid alloy is caused by an increase in the volume per structural unit of the melt (ion, atom, or cluster).…”

Thermophysical Properties of the Fe48Cr15Mo14C15B6Y2 Alloy in Liquid State

“…This indicates that electrical resistivity methods lack sensitivity when observing the changes occurring in the liquid state at these temperatures. The decrease in electrical resistivity with increasing temperature may be explained through the microheterogeneous structure of metallic melts [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. Melting of a multiphase cast iron ingot does not lead to the immediate formation of a homogeneous solution of the alloying elements in iron, with a microheterogeneous state persisting within a certain temperature range.…”