Electronic structure of edge dislocation of core-doped Ti in Fe

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	Electronic structure of edge dislocation of core-doped Ti in Fe
	H. L. Dang ; C. Y. Wang ; X. L. Shu
刊名	Progress in Natural Science
	2004
卷号	14 期号:6 页码:477-482
关键词	edge dislocation doping effect electronic structure transition-metals iron
ISSN号	1002-0071
中文摘要	The electronic structure of an edge dislocation doped Ti lying in the (001) plane with Burgers Vector along [ 100] direction in body-centered cubic iron is investigated using the first principles discrete variational method (DVM) based on the density-functional theory. The binding energy, impurity formation energy, interatomic energy, Mulliken orbital populations and charge density difference are presented in this paper. By calculating the binding energy of the clean dislocation system and the Ti-doped system, it is found that the binding energy of Ti-doped dislocation system is lower than that of the clean dislocation system, which implies that the Ti-doped dislocation system is more stable than the clean dislocation system.. The calculated result of the impurity formation energy predicts the trapping effect of dislocation core for Ti, which shows that Ti atom prefers to occupy the place at the dislocation core. The calculated results of the interatomic energy and the difference charge density of dislocation doped Ti system indicate that the stronger bonding formed between the Ti impurity and its neighbor Fe atoms will affect the mechanical property of edge dislocation. Considering the influence of Ti on the electronic structure and the energies, we can predict that the trace Ti in transition metal Fe with dislocation defect can give a significant contribution to the solid solution hardening effects and will influence the mechanical property of materials.
原文出处	://WOS:000222198000004
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/35338]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	H. L. Dang,C. Y. Wang,X. L. Shu. Electronic structure of edge dislocation of core-doped Ti in Fe[J]. Progress in Natural Science,2004,14(6):477-482.
APA	H. L. Dang,C. Y. Wang,&X. L. Shu.(2004).Electronic structure of edge dislocation of core-doped Ti in Fe.Progress in Natural Science,14(6),477-482.
MLA	H. L. Dang,et al."Electronic structure of edge dislocation of core-doped Ti in Fe".Progress in Natural Science 14.6(2004):477-482.