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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
Source PublicationPHYSICA B-CONDENSED MATTER
ISSN0921-4526
Volume521Issue:-Pages:6-12
Subtype期刊论文
AbstractThe 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.
KeywordSuperhard Materials Crystals Hardness Diborides Ceramics Strain
DOI10.1016/j.physb.2017.06.028
WOS KeywordSUPERHARD MATERIALS ; CRYSTALS ; HARDNESS ; DIBORIDES ; CERAMICS ; STRAIN
Indexed BySCI
Language英语
WOS IDWOS:000410633400002
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28769
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
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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