Phase stability and incompressibility of tungsten boride (WB) researched by in-situ high pressure x-ray diffraction

doi:10.1016/j.physb.2017.06.028

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	Phase stability and incompressibility of tungsten boride (WB) researched by in-situ high pressure x-ray diffraction
	Wang, JH; Liu J(刘景); Liu, J; Yang, K; Guan, SX; Liang, H; Chen, Y; Li, FJ; Wang, QM; Zhang, Q
刊名	PHYSICA B-CONDENSED MATTER
	2017
卷号	521 页码:6-12
关键词	High-pressure X-ray diffraction Tungsten boride Mechanical properties Elastic mechanisms
ISSN号	0921-4526
DOI	10.1016/j.physb.2017.06.028
文献子类	Article
英文摘要	The binary tungsten boride, WB, has potential industrial applications as it not only has a high melting point but is generally harder and less compressible than the pure metals. Here, the physical and mechanical properties (phase stability, bulk modulus and compressibility) of WB were investigated by in situ high-pressure x-ray diffraction and theoretical calculations. Its crystal structure still remains stable even at the highest pressure of 63.7 GPa and room temperature for the diamond-anvil cell experiments. The pressure-volume (P-V) data were fitted using the Birch-Murnaghan EOS and the Vinet EOS to obtain the isothermal bulk modulus, K-0 = 452 (4) GPa and 451(3) GPa and its pressure derivative, K-0' = 4 (fixed) in the two sets of experiments with two different pressure transmitting mediums (PTMs), respectively. The excellent bulk modulus (K-0) is attributed to the high valence electron density of W atom, the layered and chain-like crystal structure of WB and the strong chemical bonds formed by Wand B atoms. Besides, anisotropic compression behavior of the unit-cell axes (a-and c-axes) of WB is manifested by experimental observations and theoretical calculations. This remarkably elastic property is closely related to the strongly directional bonding between W and B atoms.
电子版国际标准刊号	1873-2135
WOS关键词	SUPERHARD MATERIALS ; CRYSTALS ; HARDNESS ; DIBORIDES ; CERAMICS ; STRAIN
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000410633400002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284914]
专题	中国科学院高能物理研究所_中国散裂中子源高能物理研究所_实验物理中心高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Wang, JH,Liu J,Liu, J,et al. Phase stability and incompressibility of tungsten boride (WB) researched by in-situ high pressure x-ray diffraction[J]. PHYSICA B-CONDENSED MATTER,2017,521:6-12.
APA	Wang, JH.,刘景.,Liu, J.,Yang, K.,Guan, SX.,...&Fan, C.(2017).Phase stability and incompressibility of tungsten boride (WB) researched by in-situ high pressure x-ray diffraction.PHYSICA B-CONDENSED MATTER,521,6-12.
MLA	Wang, JH,et al."Phase stability and incompressibility of tungsten boride (WB) researched by in-situ high pressure x-ray diffraction".PHYSICA B-CONDENSED MATTER 521(2017):6-12.