Compressibility of liquid FeS measured using X-ray radiograph imaging

Density of liquid FeS was measured at 1650 K and pressures up to 5.6 GPa using the X-ray absorption radiograph system of the X17B2 beamline at the National Synchrotron Light Source at the Brookhaven National Laboratory. The experimental data were fitted to the third-order Birch-Murnaghan equation of state to calculate the isothermal bulk modulus (K-0) of the liquid, yielding K-0 = 11 +/- 3 GPa when the pressure derivative of bulk modulus is fixed at 5. Combining this result with those from previous studies on Fe-S liquid system, we suggest an exponential relation between the liquid Fe-S alloy bulk modulus and its sulfur content. Published by Elsevier B.V.