Low-compressibility of tungsten tetraboride: a high pressure X-ray diffraction study

被引：41
|
作者：
Liu, Chenji [1 ]
Peng, Fang [1 ]
Tan, Ning [1 ]
Liu, Jing [2 ]
Li, Fengjiao [1 ]
Qin, Jiaqian [1 ,3 ]
Wang, Jianghua [1 ]
Wang, Qiming [1 ]
He, Duanwei [1 ]
机构：
[1] Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Peoples R China
[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[3] Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan
来源：
HIGH PRESSURE RESEARCH | 2011年 / 31卷 / 02期
基金：
中国国家自然科学基金;
关键词：
tungsten tetraboride; equation of state; low-compressibility; synchrotron X-ray diffraction; SUPERHARD RHENIUM DIBORIDE; OSMIUM DIBORIDE; SILICONE FLUID; DIAMOND;
D O I：
10.1080/08957959.2011.582871
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Diamond anvil cell synchrotron X-ray diffraction (XRD) experiments have been carried out on submicron-sized tungsten tetraboride (WB4) at room temperature up to 50.8GPa with a silicone oil pressure medium. The crystal structure of WB4 remains unchanged up to the highest pressure. The isothermal bulk modulus K0 and its pressure derivative, [image omitted], have been determined from the present compression by fitting the third-order Birch-Murnaghan equation of state: K0=325 +/- 9GPa and [image omitted]. The high value of the bulk modulus shows that WB4 has high stiffness and/or low-compressibility. Moreover, we also found that the compression behavior of the unit cell axes (a- and c-axes) of WB4 demonstrates an anisotropic nature of compressibility.
引用
收藏
页码：275 / 282
页数：8
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