Zirconium and Iron Densities in a Wide Range of Liquid States

Metals (Fe, Zr) were investigated under a 1-bar air ambient atmosphere. Electrical pulse current heating was applied to iron and zirconium wires for 5 to 7 ms. The specimens were shadowgraphed by a pulse laser with a duration of y % 6 ns. The shadow picture was then transmitted to a digital CCD camera and subjected to digital photometrical processing. The differences between the measured and the known literature values for liquid iron density are 1 to 6%, which shows that this new method is appropriate. The dependences of resistivity on the specific imparted energy were obtained for the liquid state of Fe and Zr. With the examples of iron and zirconium, the possibility of using the proposed method to obtain reliable data for the thermal expansion of liquid metals and the electrical resistivity over a wide range of the liquid phase is demonstrated.