论文标题
一种潜在的热量方法，用于检测梅加巴尔压力的金属熔化和冷冻
A latent heat method to detect melting and freezing of metals at megabar pressures
论文作者
论文摘要
金属的高压熔融曲线为熔化理论提供了简单而有用的测试，以及对行星内部建模的重要约束。在这里，我们提出了一种实验技术，该技术揭示了在钻石砧室中压缩的金属样品的潜在热热。该技术首次将微秒的电量脉冲电加热与内部加热的钻石细胞结合在一起。此外，我们使用该技术来测量铂金的熔融曲线至迄今为止测量的最高压力。熔化温度从34 GPA的$ \ sim 3000 $ k增加到$ \ sim 4500 $ k，在107 GPA时，陡峭和浅的实验性融化曲线之前报道了热力学条件。熔融曲线是在此处研究的0％至20％的压缩范围内压缩的线性函数，可以拟合具有拟合参数$ C = 6.0 $的Kraut-Kennedy经验模型。
The high-pressure melting curves of metals provide simple and useful tests for theories of melting, as well as important constraints for the modeling of planetary interiors. Here, we present an experimental technique that reveals the latent heat of fusion of a metal sample compressed inside a diamond anvil cell. The technique combines microsecond-timescale pulsed electrical heating with an internally-heated diamond anvil cell for the first time. Further, we use the technique to measure the melting curve of platinum to the highest pressure measured to date. Melting temperature increases from $\sim 3000$ K at 34 GPa to $\sim 4500$ K at 107 GPa, thermodynamic conditions that are between the steep and shallow experimental melting curves reported previously. The melting curve is a linear function of compression over the 0 to 20% range of compression studied here, allowing a good fit to the Kraut-Kennedy empirical model with fit parameter $C=6.0$.
