The effects of boron and hydrogen on the embrittlement of polycrystalline Ni(3)AL
文献类型：期刊论文
| 作者 | Wang, FH ; Shang, JX ; Li, JM ; Wang, CY |
| 刊名 | INTERMETALLICS
 |
| 出版日期 | 2000 |
| 卷号 | 8期号:5-6页码:589 |
| 关键词 | ROOM-TEMPERATURE DUCTILITY ENVIRONMENTAL EMBRITTLEMENT ELECTRONIC-STRUCTURE GRAIN-BOUNDARIES NI3AL ALLOYS FRACTURE |
| ISSN号 | 0966-9795 |
| 通讯作者 | Wang, FH (reprint author), Tsing Hua Univ, Dept Phys, Ctr Atom & Mol Sci, Beijing 100084, Peoples R China. |
| 中文摘要 | The discrete-variational method within the framework of density functional theory is used to study the effects of both boron and hydrogen on the embrittlement of polycrystalline Ni3Al. The calculated results show that there are strong repulsive interaction between the boron and the hydrogen atoms, if they occupy the nearest interstitial sites, respectively, in the Ni3Al grain boundaries. It indicates that the boron atoms inhibit the diffusion of hydrogen atoms along the grain boundary. It may be the main reason why boron call suppress the moisture induced hydrogen embrittlement. Our results also show that the attractive interactions between boron and some substrate atoms are weakened, but the attractive interactions between boron and other substrate atoms are enhanced, when hydrogen atoms are forced into the grain boundary and occupy the nearest interstitial sites to boron atoms. As a result, the bonding states are polarized in the local region of the grain boundary. It may suppress the movement of slips across the grain boundary. Furthermore, the weakening effects of hydrogen to the grain boundary are hardly affected by the boron atoms, even though they are very near to each other. It can be concluded that hydrogen embrittlement takes place when the boron-doped polycrystalline Ni3Al are charged with hydrogen. (C) 2000 Elsevier Science Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/45085]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang, FH,Shang, JX,Li, JM,et al. The effects of boron and hydrogen on the embrittlement of polycrystalline Ni(3)AL[J]. INTERMETALLICS,2000,8(5-6):589. |
| APA | Wang, FH,Shang, JX,Li, JM,&Wang, CY.(2000).The effects of boron and hydrogen on the embrittlement of polycrystalline Ni(3)AL.INTERMETALLICS,8(5-6),589. |
| MLA | Wang, FH,et al."The effects of boron and hydrogen on the embrittlement of polycrystalline Ni(3)AL".INTERMETALLICS 8.5-6(2000):589. |
入库方式： OAI收割
来源：物理研究所
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