QQ客服 官方微博 反馈留言

	Influence of Nb doping on oxidation resistance of gamma-TiAl: A first principles study
	H. Li ; S. Q. Wang ; H. Q. Ye
刊名	Acta Physica Sinica
	2009
卷号	58期号:6页码:S224-S229
关键词	gamma-TiAl high temperature oxidation Nb doping formation energy intermetallic alloys isothermal oxidation ion-implantation behavior surface temperature coatings elements 1st-principles 900-degrees-c
ISSN号	1000-3290
中文摘要	Nb doping is proved to be the most promising way of enhancing the oxidation resistance of TiAl alloys, yet the intrinsic mechanism is still unclear. To understand the effect of Nb doping, a first principles study of several point defects in gamma-TiAl during oxidation is performed. Besides the determination of the stable defect structures it is revealed that (1) the formation energy of Nb doping increases with Nb content increasing, at the cost of degradation of the phase stability, which is a hindrance to the oxidation resistance; (2) the abilities of interstitial oxygen and titanium vacancy formation are lowered by Nb addition, thus oxygen diffusion and vacancy formation are reduced correspondingly, which enhances the oxidation resistance of the alloy; (3) the effect of Nb doping on the formation energy of point defect is rather localized, therefore the influence of Nb doping is correlated with its distribution and content in gamma-TiAl.
原文出处	://WOS:000270312900037
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/32018]
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. Li,S. Q. Wang,H. Q. Ye. Influence of Nb doping on oxidation resistance of gamma-TiAl: A first principles study[J]. Acta Physica Sinica,2009,58(6):S224-S229.
APA	H. Li,S. Q. Wang,&H. Q. Ye.(2009).Influence of Nb doping on oxidation resistance of gamma-TiAl: A first principles study.Acta Physica Sinica,58(6),S224-S229.
MLA	H. Li,et al."Influence of Nb doping on oxidation resistance of gamma-TiAl: A first principles study".Acta Physica Sinica 58.6(2009):S224-S229.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。