Characterization of a new Nb-silicide (-Nb11Si4) in Nb-Si binary systems

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	Characterization of a new Nb-silicide (-Nb11Si4) in Nb-Si binary systems
	G. M. Cheng; H. Y. Qian; L. L. He; H. Q. Ye
	2010
发表期刊	Philosophical Magazine
ISSN	1478-6435
卷号	90 期号:19 页码:2557-2568
摘要	A new Nb-silicide, -Nb11Si4, identified as a second phase precipitated from a Nb-Si solid solution, was characterized by combining crystallographic analysis with first-principles calculations. The crystal structure was determined as a body-centered orthorhombic system with space group Immm using transmission electron microscope (TEM). Based on the crystallographic relationship between the and Nb phases, [image omitted] // {200}Nb and [image omitted] // < 001 > Nb, eight possible unit cells were proposed, which were optimized by first-principles calculations. By analyzing the experimental and calculated data, we obtained the final unit cell of the phase, which was confirmed by high-resolution TEM images. In addition, density of states and electron density difference of -Nb11Si4 revealed that the structure was in a metastable state at low temperature because not all the bonding states were filled.
部门归属	[cheng, guangming; he, lianlong; ye, hengqiang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [qian, haiyan] shanghai univ, inst mat sci, shanghai 200072, peoples r china. [ye, hengqiang] peking univ, electron microscope lab, beijing 100871, peoples r china.;he, ll (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;llhe@imr.ac.cn
关键词	Microstructure Precipitation Niobium-silicide Orientation Relationship Transmission Electron Microscopy Orientation Relationship Phase-stability Composites Alloys
URL	查看原文
WOS记录号	WOS:000278163900002
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31043
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. M. Cheng,H. Y. Qian,L. L. He,et al. Characterization of a new Nb-silicide (-Nb11Si4) in Nb-Si binary systems[J]. Philosophical Magazine,2010,90(19):2557-2568.
APA	G. M. Cheng,H. Y. Qian,L. L. He,&H. Q. Ye.(2010).Characterization of a new Nb-silicide (-Nb11Si4) in Nb-Si binary systems.Philosophical Magazine,90(19),2557-2568.
MLA	G. M. Cheng,et al."Characterization of a new Nb-silicide (-Nb11Si4) in Nb-Si binary systems".Philosophical Magazine 90.19(2010):2557-2568.