Density measurements and structural properties of liquid and amorphous metals under high pressure
Density measurements and structural properties of liquid and amorphous metals under high pressure
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DOI：
10.1080/08957959.2013.860137
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发表时间：
2013-12
影响因子：
2
通讯作者：
G. Morard;G. Garbarino;D. Antonangeli;D. Andrault;N. Guignot;J. Siebert;Mathilde Roberge;E. Boulard;A. Lincot;A. Denoeud;S. Petitgirard
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文献类型：
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作者：
G. Morard;G. Garbarino;D. Antonangeli;D. Andrault;N. Guignot;J. Siebert;Mathilde Roberge;E. Boulard;A. Lincot;A. Denoeud;S. Petitgirard
我们已经实现了一种适用于确定压力-体积-温度状态方程的临界情况下的液体和非晶材料在扩展的热力学范围内（T>2000 K和P>40 GPa）的原位X射线衍射分析方法。这种方法是通用的，它可以应用于使用各种角色散X射线衍射高压装置获得的数据，相反，在原位X射线吸收技术，是独立于样品的几何形状。另一个优点是快速数据采集（10至300 s的积分时间）。可以并行地收集关于宏观体积性质（密度）和局部原子排列（对分布函数g（r））的信息。为了说明这种方法，我们目前的研究在巴黎爱丁堡出版社和激光加热金刚石对顶砧（DAC），并在室温下测量在DAC中的Ce玻璃的液态Fe-S合金。
We have implemented an in situ X-ray diffraction analysis method suitable for the determination of pressure–volume–temperature equations of state in the critical case of liquid and amorphous materials over an extended thermodynamic range (T>2000 K and P>40 GPa). This method is versatile, it can be applied to data obtained using various angle-dispersive X-ray diffraction high pressure apparatus and, contrary to in situ X-ray absorption techniques, is independent from the sample geometry. Further advantage is the fast data acquisition (between 10 and 300 s integration time). Information on macroscopic bulk properties (density) and local atomic arrangement (pair distribution function g(r)) can be gathered in parallel. To illustrate the method, we present studies on liquid Fe–S alloys in the Paris Edinburgh press and in laser-heated diamond anvil cell (DAC), and measurements on Ce glass in DAC at room temperature.