Abstract
A modified sessile drop method was developed to obtain the precise density values for liquid nickel and nickel-chromium alloy in liquid and solid-liquid coexistence states. The density of liquid nickel decreases linearly with increasing temperature in the range from the melting point to 1923 K. The density at the melting point and the thermal expansion coefficient of liquid nickel are 7.91 Mg.m -3 and 1.81 × 10 -4 K -1 , respectively. The density of nickel-chromium alloy in liquid or solid-liquid coexistence state decreases linearly with increasing the temperature and chromium concentration in the alloy. The temperature coefficient of density of nickel-chromium alloy changes at the liquidus temperature. The absolute value of the temperature coefficient of density in solid-liquid coexistence state is larger than that in liquid state.
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