Irradiation-induced structural transitions in Ti2AlC

doi:10.1016/j.actamat.2015.07.043

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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
刊名	ACTA MATERIALIA
	2015
关键词	MAX phase ceramics Irradiation effects Phase transitions ION IRRADIATION RADIATION TOLERANCE MICROSTRUCTURAL CHARACTERIZATION M(N+1)AX(N) PHASES TI3ALC2 CERAMICS DAMAGE EVOLUTION MAX PHASES HEAVY-IONS TI3SIC2 BEHAVIOR
DOI	10.1016/j.actamat.2015.07.043
英文摘要	In 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.; National Magnetic Confinement Fusion Energy Research Project [2015GB113000]; National Natural Science Foundation of China [11335003, 91226202]; SCI(E); EI; ARTICLE; ygwang@pku.edu.cn; 197-205; 98
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/416034]
专题	工学院
推荐引用方式 GB/T 7714	Wang, Chenxu,Yang, Tengfei,Xiao, Jingren,et al. Irradiation-induced structural transitions in Ti2AlC[J]. ACTA MATERIALIA,2015.
APA	Wang, Chenxu.,Yang, Tengfei.,Xiao, Jingren.,Liu, Shaoshuai.,Xue, Jianming.,...&Wang, Yugang.(2015).Irradiation-induced structural transitions in Ti2AlC.ACTA MATERIALIA.
MLA	Wang, Chenxu,et al."Irradiation-induced structural transitions in Ti2AlC".ACTA MATERIALIA (2015).