Role of the X and n factors in ion-irradiation induced phase transformations of M(n+1)AX(n) phases
文献类型：期刊论文
| 作者 | Huang, Qing; Wang, Chenxu; Yang, Tengfei; Tracy, Cameron L.; Xiao, Jingren; Liu, Shaoshuai; Fang, Yuan; Yan, Zhanfeng; Ge, Wei; Xue, Jianming |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2018 |
| 卷号 | 144页码:432-446 |
| 关键词 | Augmented-wave Method Max Phases Structural Transitions Electronic-structure Damage Evolution Ti3alc2 Ti2alc Ti3sic2 Ceramics Ti4aln3 |
| 英文摘要 | Phase transitions induced in hcp M(n+1)AX(n) phases (Ti2AlN, Ti2AlC, and Ti4AlN3) by 1 MeV Au+ ion irradiation were investigated, over a series of ion fluences ranging from 1 x 10(14) to 2 x 10(16) ions cm(-2), by transmission electron microscopy (TEM) and synchrotron grazing incidence X-ray diffraction (GIXRD). Irradiation-induced structural evolutions were observed using high-resolution TEM (HRTEM) imaging and selected area electron diffraction (SAED). Based on phase contrast imaging and electron diffraction pattern (EDP) simulations, the atomic-scale mechanisms for the phase transitions were determined. Transformations of the initial hcp phases to the intermediate gamma-phases and fcc phases were driven by the formation of Ti/Al antisite defects and extended stacking faults induced by ion irradiation. By comparing the transformation behavior of Ti2AlN with that of Ti2AlC and Ti4AlN3 under the same irradiation conditions, using both the experimental data and first-principles calculations, the role of the X and n parameters in the radiation responses of M(n+1)AX(n) phases were elucidated. The susceptibilities of materials in this Ti-Al-X (X = C, N) system to irradiation-induced phase transitions were determined with respect to the bonding characteristics and compositions of these MAX phases. Ti2AlC is slightly less susceptible to the radiation-induced phase transformation than Ti2AlN, which is attributed to the stronger Ti-Al bond covalency in Ti2AlN. Ti4AlN3 is more resistant to radiation-induced phase transformations than is Ti2AlN, due to the lower Al content and lower anion vacancy ratio in the irradiation-induced solid solution phases. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 学科主题 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 公开日期 | 2018-12-04 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/16835]  |
| 专题 | 2018专题 |
| 推荐引用方式 GB/T 7714 | Huang, Qing,Wang, Chenxu,Yang, Tengfei,et al. Role of the X and n factors in ion-irradiation induced phase transformations of M(n+1)AX(n) phases[J]. ACTA MATERIALIA,2018,144:432-446. |
| APA | Huang, Qing.,Wang, Chenxu.,Yang, Tengfei.,Tracy, Cameron L..,Xiao, Jingren.,...&Wang, Yugang.(2018).Role of the X and n factors in ion-irradiation induced phase transformations of M(n+1)AX(n) phases.ACTA MATERIALIA,144,432-446. |
| MLA | Huang, Qing,et al."Role of the X and n factors in ion-irradiation induced phase transformations of M(n+1)AX(n) phases".ACTA MATERIALIA 144(2018):432-446. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
浏览0
下载0
收藏0
其他版本
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。