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论文题目是:Predicted Boron-Carbide Compounds: A First-Principles Study, Journal of Chemical Physics 140, 224704 (2014)
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06022043: 金币+5, ★★★★★最佳答案 2014-11-23 13:23:57
Predicted boron-carbide compounds: A first-principles study
作者:Wang, DY (Wang, De Yu)[ 1 ] ; Yan, Q (Yan, Qian)[ 1 ] ; Wang, B (Wang, Bing)[ 1 ] ; Wang, YX (Wang, Yuan Xu)[ 1 ] ; Yang, JM (Yang, Jueming)[ 1 ] ; Yang, G (Yang, Gui)[ 1 ]
JOURNAL OF CHEMICAL PHYSICS
卷: 140  期: 22
文献号: 224704
DOI: 10.1063/1.4882071
出版年: JUN 14 2014
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摘要
By using developed particle swarm optimization algorithm on crystal structural prediction, we have explored the possible crystal structures of B-C system. Their structures, stability, elastic properties, electronic structure, and chemical bonding have been investigated by first-principles calculations with density functional theory. The results show that all the predicted structures are mechanically and dynamically stable. An analysis of calculated enthalpy with pressure indicates that increasing of boron content will increase the stability of boron carbides under low pressure. Moreover, the boron carbides with rich carbon content become more stable under high pressure. The negative formation energy of predicted B5C indicates its high stability. The density of states of B5C show that it is p-type semiconducting. The calculated theoretical Vickers hardnesses of B-C exceed 40 GPa except B4C, BC, and BC4, indicating they are potential superhard materials. An analysis of Debye temperature and electronic localization function provides further understanding chemical and physical properties of boron carbide. (C) 2014 AIP Publishing LLC.
关键词
KeyWords Plus:SUPERHARD; CRYSTALS
作者信息
通讯作者地址: Wang, DY (通讯作者)
显示增强组织信息的名称        Henan Univ, Sch Phys & Elect, Inst Computat Mat Sci, Kaifeng 475004, Peoples R China.
地址:
显示增强组织信息的名称        [ 1 ] Henan Univ, Sch Phys & Elect, Inst Computat Mat Sci, Kaifeng 475004, Peoples R China
电子邮件地址:wangyx@henu.edu.cn
基金资助致谢
基金资助机构        授权号
National Natural Science Foundation of China        
21071045
51371076
Program for New Century Excellent Talents in University        
NCET-10-0132
Program for Innovative Research Team (in Science and Technology) in University of Henan Province        
13IRTSTHN017
查看基金资助信息   
出版商
AMER INST PHYSICS, CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
类别 / 分类
研究方向hysics
Web of Science 类别hysics, Atomic, Molecular & Chemical
文献信息
文献类型:Article
语种:English
入藏号: WOS:000337806100047
ISSN: 0021-9606
电子 ISSN: 1089-7690
其他信息
IDS 号: AJ6LJ
Web of Science 核心合集中的 "引用的参考文献": 38
Web of Science 核心合集中的 "被引频次": 0
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