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

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Phase stability and incompressibility of tungsten boride (WB) researched by in-situ high pressure x-ray diffraction
	Fan, C; Liu, CJ; Peng, F; Tan, N; Tang, MJ; Zhang, Q; Wang, QM; Li, FJ; Wang, JH; Chen, Y; Liang, H; Guan, SX; Yang, K; Liu, J
	2017
发表期刊	PHYSICA B-CONDENSED MATTER
ISSN	0921-4526
卷号	521 期号:-页码:6-12
文章类型	期刊论文
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.
关键词	Superhard Materials Crystals Hardness Diborides Ceramics Strain
DOI	10.1016/j.physb.2017.06.028
关键词[WOS]	SUPERHARD MATERIALS ; CRYSTALS ; HARDNESS ; DIBORIDES ; CERAMICS ; STRAIN
收录类别	SCI
语种	英语
WOS记录号	WOS:000410633400002
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/28769
专题	中科院上海应用物理研究所2011-2018年
推荐引用方式 GB/T 7714	Fan, C,Liu, CJ,Peng, F,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	Fan, C.,Liu, CJ.,Peng, F.,Tan, N.,Tang, MJ.,...&Liu, J.(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	Fan, C,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.

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