Orientation relationship and interfacial structure between alpha-Nb(5)Si(3) and Nb solid solution in the eutectic lamellar structure

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	Orientation relationship and interfacial structure between alpha-Nb(5)Si(3) and Nb solid solution in the eutectic lamellar structure
	G. M. Cheng; Y. X. Tian; L. L. He; J. T. Guo
	2009
发表期刊	Philosophical Magazine
ISSN	1478-6435
卷号	89 期号:31 页码:2801-2812
摘要	The orientation relationship (OR) and the interfacial structure of the eutectic alpha-Nb(5)Si(3) and Nb solid solution (Nbss) lamellar microstructure were investigated by transmission electron microscopy (TEM). The OR between alpha-Nb(5)Si(3) and Nbss was determined as (002)(alpha)//(002)(Nb) and [310](alpha)//[110](Nb). In spite of the significant difference in crystal structure between alpha-Nb(5)Si(3) and Nbss, the interface was found to be semi-coherent with good matching. High-resolution TEM images of the alpha-Nb(5)Si(3)/Nbss interface are presented to describe the chemistry of the terminating plane of alpha-Nb(5)Si(3). The results revealed that a pure Nb layer not Si or mixed (Nb + Si) layer of the alpha-Nb(5)Si(3) phase was bonded to the Nb phase at the interface. A periodic array of edge-type misfit dislocations, with line direction [1 (1) over bar0](Nb) and Burgers vector 1/2[1 (1) over bar0](Nb), was observed at the interface.
部门归属	[cheng, guangming; he, lianlong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [tian, yuxin; guo, jianting] chinese acad sci, inst met res, superalloy div, shenyang 110016, peoples r china. [cheng, guangming] chinese acad sci, grad sch, beijing 100039, peoples r china.;he, ll (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;llhe@imr.ac.cn
关键词	Microstructure Orientation Relationship Interfacial Structure Alpha-nb5si3 Transmission Electron Microscopy Epitaxial Nb-al2o3 Interfaces Silicide-based Composites Atomic-structure Alloy Microstructure Behavior Phase
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31845
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. M. Cheng,Y. X. Tian,L. L. He,et al. Orientation relationship and interfacial structure between alpha-Nb(5)Si(3) and Nb solid solution in the eutectic lamellar structure[J]. Philosophical Magazine,2009,89(31):2801-2812.
APA	G. M. Cheng,Y. X. Tian,L. L. He,&J. T. Guo.(2009).Orientation relationship and interfacial structure between alpha-Nb(5)Si(3) and Nb solid solution in the eutectic lamellar structure.Philosophical Magazine,89(31),2801-2812.
MLA	G. M. Cheng,et al."Orientation relationship and interfacial structure between alpha-Nb(5)Si(3) and Nb solid solution in the eutectic lamellar structure".Philosophical Magazine 89.31(2009):2801-2812.