Influence of Nb doping on oxidation resistance of gamma-TiAl: A first principles study
文献类型：期刊论文
| 作者 | H. Li ; S. Q. Wang ; H. Q. Ye |
| 刊名 | Acta Physica Sinica
 |
| 出版日期 | 2009 |
| 卷号 | 58期号:6页码:S224-S229 |
| ISSN号 | 1000-3290 |
| 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 |
| 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 | |
| 公开日期 | 2012-04-13 |
| 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. |
入库方式： OAI收割
来源：金属研究所
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