通过原位X射线衍射确定的硼化钛状态方程

Titanium boride equation of state determined by in-situ X-ray diffraction.

作者信息

Ono Shigeaki, Kikegawa Takumi

机构信息

Research and Development Center for Ocean Drilling Science, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima-cho, Yokosuka, Kanagawa 237-0061, Japan.

High Energy Acceleration Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan.

出版信息

Heliyon. 2016 Dec 22;2(12):e00220. doi: 10.1016/j.heliyon.2016.e00220. eCollection 2016 Dec.

DOI:10.1016/j.heliyon.2016.e00220

PMID:28054038

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5198855/

Abstract

The equation of state (EOS) of titanium boride, TiB, was investigated by in situ X-ray diffraction in a diamond anvil cell and multianvil high-pressure apparatus. The pressure-volume-temperature () data were collected at up to 111 GPa and room temperature for the diamond-anvil cell experiments and at up to 15 GPa and 1300 K for the multianvil experiments. No phase transition was observed through the entire range of experimental conditions. The pressure-volume data at room temperature were fitted using a Vinet EOS to obtain the isothermal bulk modulus, = 256.7 GPa, and its pressure derivative, ' = 3.83. When fitting a thermal EOS using the data for the multianvil experiments, we find that [Formula: see text] = 0.095 (GPa/K) and α = 2.49 × 10 K.

摘要

通过在金刚石对顶砧单元和多砧高压装置中进行原位X射线衍射，研究了硼化钛（TiB）的状态方程（EOS）。在金刚石对顶砧单元实验中，在高达111 GPa和室温下收集压力 - 体积 - 温度（(P-V-T)）数据；在多砧实验中，在高达15 GPa和1300 K下收集数据。在整个实验条件范围内均未观察到相变。使用Vinet状态方程对室温下的压力 - 体积数据进行拟合，以获得等温体积模量(K_0 = 256.7) GPa及其压力导数(K_0' = 3.83)。当使用多砧实验的(P-V-T)数据拟合热状态方程时，我们发现(\beta = 0.095)（GPa/K）且(\alpha = 2.49×10^{-5}) K⁻¹。