Carbon Nanotubes Enhance the Radiation Resistance of bcc Iron Revealed by Atomistic Study
With extra space, a carbon nanotube (CNT) could serve as an absorber of point defects, including helium interstitials, and outgas the accumulate helium via “nano-chimneys”. The radiation resistance of CNT/Fe has still not been fully understood. Herein, we investigated the influen...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-01-01
|
Series: | Materials |
Subjects: | |
Online Access: | http://www.mdpi.com/1996-1944/12/2/217 |
id |
doaj-02c751f3e9374dae8192c6ced1acbb66 |
---|---|
record_format |
Article |
spelling |
doaj-02c751f3e9374dae8192c6ced1acbb662020-11-25T02:51:55ZengMDPI AGMaterials1996-19442019-01-0112221710.3390/ma12020217ma12020217Carbon Nanotubes Enhance the Radiation Resistance of bcc Iron Revealed by Atomistic StudyShuzhuang Liu0Lu Xie1Qing Peng2Rui Li3School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaNuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USASchool of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaWith extra space, a carbon nanotube (CNT) could serve as an absorber of point defects, including helium interstitials, and outgas the accumulate helium via “nano-chimneys”. The radiation resistance of CNT/Fe has still not been fully understood. Herein, we investigated the influence of CNTs on low-energy helium irradiation resistance in CNT/Fe composites by molecular dynamic simulations. CNTs reduced the small and medium He clusters in the Fe matrix. When the incident energy of the He atoms was 300 eV, the He atoms aggregated at the outer surface of CNTs. CNTs postponed the formation of He bubbles. When the irradiation energy was higher than 600 eV, He atoms could penetrate the walls of CNTs and form clusters inside the single-walled CNTs or the space in double-walled CNTs—the latter presented better performance. The reduction of Frenkel pair point defects suggested the enhancement of radiation resistance by the presentation of CNTs. Our results might be useful for the material design of advanced steels for radiation resistance.http://www.mdpi.com/1996-1944/12/2/217irradiationcarbon nanotube/Fe compositeHe bubblespoint defects |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shuzhuang Liu Lu Xie Qing Peng Rui Li |
spellingShingle |
Shuzhuang Liu Lu Xie Qing Peng Rui Li Carbon Nanotubes Enhance the Radiation Resistance of bcc Iron Revealed by Atomistic Study Materials irradiation carbon nanotube/Fe composite He bubbles point defects |
author_facet |
Shuzhuang Liu Lu Xie Qing Peng Rui Li |
author_sort |
Shuzhuang Liu |
title |
Carbon Nanotubes Enhance the Radiation Resistance of bcc Iron Revealed by Atomistic Study |
title_short |
Carbon Nanotubes Enhance the Radiation Resistance of bcc Iron Revealed by Atomistic Study |
title_full |
Carbon Nanotubes Enhance the Radiation Resistance of bcc Iron Revealed by Atomistic Study |
title_fullStr |
Carbon Nanotubes Enhance the Radiation Resistance of bcc Iron Revealed by Atomistic Study |
title_full_unstemmed |
Carbon Nanotubes Enhance the Radiation Resistance of bcc Iron Revealed by Atomistic Study |
title_sort |
carbon nanotubes enhance the radiation resistance of bcc iron revealed by atomistic study |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-01-01 |
description |
With extra space, a carbon nanotube (CNT) could serve as an absorber of point defects, including helium interstitials, and outgas the accumulate helium via “nano-chimneys”. The radiation resistance of CNT/Fe has still not been fully understood. Herein, we investigated the influence of CNTs on low-energy helium irradiation resistance in CNT/Fe composites by molecular dynamic simulations. CNTs reduced the small and medium He clusters in the Fe matrix. When the incident energy of the He atoms was 300 eV, the He atoms aggregated at the outer surface of CNTs. CNTs postponed the formation of He bubbles. When the irradiation energy was higher than 600 eV, He atoms could penetrate the walls of CNTs and form clusters inside the single-walled CNTs or the space in double-walled CNTs—the latter presented better performance. The reduction of Frenkel pair point defects suggested the enhancement of radiation resistance by the presentation of CNTs. Our results might be useful for the material design of advanced steels for radiation resistance. |
topic |
irradiation carbon nanotube/Fe composite He bubbles point defects |
url |
http://www.mdpi.com/1996-1944/12/2/217 |
work_keys_str_mv |
AT shuzhuangliu carbonnanotubesenhancetheradiationresistanceofbccironrevealedbyatomisticstudy AT luxie carbonnanotubesenhancetheradiationresistanceofbccironrevealedbyatomisticstudy AT qingpeng carbonnanotubesenhancetheradiationresistanceofbccironrevealedbyatomisticstudy AT ruili carbonnanotubesenhancetheradiationresistanceofbccironrevealedbyatomisticstudy |
_version_ |
1724732627370377216 |