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Irradiation-induced structural transitions in Ti2AlC
Wang, Chenxu; Yang, Tengfei; Xiao, Jingren; Liu, Shaoshuai; Xue, Jianming; Wang, Jingyang; Huang, Qing; Wang, Yugang; ygwang@pku.edu.cn
2015
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume98Pages:197-205
AbstractIn this study, 1 MeV Au ions were used to irradiate Ti2AlC at room temperature with fluences ranging from 1 x 10(14) to 2 x 10(16) cm(-2). The structural transformation and the evolutions of defects induced by Au irradiation were investigated by means of Grazing incidence X-ray diffraction (GIXRD) and transmission electron microscopy (TEM). GIXRD analyses show serious structural disorder and phase transitions, which are consistent with the selected area electron diffraction (SAED) results and high-resolution TEM images. TEM observations reveal that the nanolayered structures are partially disturbed at the lowest fluence of 1 x 10(14) cm(-2), with the phase transition from original hexagonal-close-packed (hcp) structure to gamma-Ti2AlC phase structure. With the fluence increasing, more extended defects lead to the symmetry variation and the transformation of a possible delta-phase structure. At the highest fluence of 2 x 10(16) cm(-2), some face-centered-cubic (fcc) structures are formed from the original hcp structures without amorphization, indicating a great tolerance of irradiation-induced amorphization of Ti2AlC. Based on the phase contrast images and EDPs simulation of the microstructures of the transformed structures, a mechanism for the phase transitions of Ti2AlC is proposed. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[wang, chenxu ; yang, tengfei ; xiao, jingren ; liu, shaoshuai ; xue, jianming ; wang, yugang] peking univ, ctr appl phys & technol, state key lab nucl phys & technol, beijing 100871, peoples r china ; [wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [huang, qing] chinese acad sci, ningbo inst mat technol & engn, ningbo 315201, zhejiang, peoples r china
KeywordMax Phase Ceramics Irradiation Effects Phase Transitions
Funding OrganizationNational Magnetic Confinement Fusion Energy Research Project [2015GB113000]; National Natural Science Foundation of China [11335003, 91226202]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74934
Collection中国科学院金属研究所
Corresponding Authorygwang@pku.edu.cn
Recommended Citation
GB/T 7714
Wang, Chenxu,Yang, Tengfei,Xiao, Jingren,et al. Irradiation-induced structural transitions in Ti2AlC[J]. ACTA MATERIALIA,2015,98:197-205.
APA Wang, Chenxu.,Yang, Tengfei.,Xiao, Jingren.,Liu, Shaoshuai.,Xue, Jianming.,...&ygwang@pku.edu.cn.(2015).Irradiation-induced structural transitions in Ti2AlC.ACTA MATERIALIA,98,197-205.
MLA Wang, Chenxu,et al."Irradiation-induced structural transitions in Ti2AlC".ACTA MATERIALIA 98(2015):197-205.
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