High-temperature equation of state of vanadium
High-temperature equation of state of vanadium
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DOI：
10.1080/08957959.2015.1123256
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发表时间：
2016-01
影响因子：
2
通讯作者：
W. Crichton;J. Guignard;E. Bailey;D. Dobson;S. Hunt;A. Thomson
中科院分区：
文献类型：
--
作者：
W. Crichton;J. Guignard;E. Bailey;D. Dobson;S. Hunt;A. Thomson
钒、NaCl和Au的晶胞尺寸已收集到11。5 GPa和1000 K的粉末X射线衍射的结果，并用于约束一个实用的高温体心立方钒的EoS。由此得到的三阶Birch-Murnaghan EoS用参数KT 0，300 = 150.4 ± 6.2 GPa，= 5.5 ± 1.0，α0 = 4.8（6）·10−5，α1 = −2.4（9）·10−8和δKTδT = −0.0446（7）GPa/K来描述。参数α.K0，300为616·10−5 K−1 GPa，在RT下估计为60 GPa时降为零。该EoS描述与该p，T范围内的大多数X射线、超声、冲击波和计算数据集完全一致。当钒用于样品组件内部时，这些测量有助于在高压下估计原位温度，并且当与h-BN一起使用时，这些测量对于在h-BN稳定性的整个范围内估计p，T是有用的。
ABSTRACT The unit cell dimensions of vanadium, NaCl and Au have been collected to 11. 5 GPa and 1000 K by powder X-ray diffraction and are used to constrain a practical high-temperature EoS for bcc vanadium. The resulting third-order Birch–Murnaghan EoS is described with parameters KT0,300 = 150.4 ± 6.2 GPa, = 5.5 ± 1.0, α0 = 4.8(6)·10−5, α1 = −2.4(9)·10−8 and δKTδT = −0.0446(7) GPa/K. The parameter α.K0,300 is 616·10−5 K−1 GPa and reduces to zero at an estimated 60 GPa at RT. This EoS description is entirely consistent with the majority of X-ray, ultrasonic, shock wave and calculated data-sets in this p, T range. These measurements facilitate the estimation of in situ temperatures under high pressures when vanadium is used inside sample assemblies and are useful, when used with h-BN, to estimate p, T over the full range of h-BN stability.