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首页> 外文期刊>Physical review >Direct measurements of thermodynamic functions and electrical resistivity of fluid tungsten over a wide range of densities
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Direct measurements of thermodynamic functions and electrical resistivity of fluid tungsten over a wide range of densities

机译：在广泛的密度范围内直接测量液态钨的热力学函数和电阻率

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Direct measurements of electrical resistivity and caloric equation of state have been performed for fluid tungsten in order to establish the relation between the liquid-vapor and the metal-to-nonmetal transition caused by thermal expansion. The measurements have been done with accuracy better than ±10% using mainly the experimental technique developed in our previous works. To estimate the systematic uncertainty of the measurements a supplementary technique has been developed which allows the thermal expansion of tungsten in the experiments to be measured directly. We demonstrate that fluid tungsten remains in a two-phase state at pressures of about one order of magnitude higher than the critical pressure of the liquid-vapor transition expected from theoretical estimates. Such behavior is very similar to that observed earlier in fluid iron [Korobenko and Rakhel, Phys. Rev. B 85, 014208 (2012)].
机译：已对液态钨进行了电阻率和热量状态方程的直接测量，以建立液态蒸汽与由热膨胀引起的金属向非金属转变之间的关系。使用我们先前工作中开发的实验技术，已经以优于±10％的精度进行了测量。为了估计测量的系统不确定性，已经开发了一种辅助技术，该技术可以直接测量实验中钨的热膨胀。我们证明，液态钨在两相状态下的压力比理论估计值所期望的液汽转变的临界压力高约一个数量级。这种行为与早期在铁水中观察到的行为非常相似[Korobenko and Rakhel，Phys。 B 85，014208（2012）。

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