Role of the X and n factors in ion-irradiation induced phase transformations of M(n+1)AX(n) phases

IMR OpenIR

	Role of the X and n factors in ion-irradiation induced phase transformations of M(n+1)AX(n) phases
	Wang, CX; Yang, TF; Tracy, CL; Xiao, JR; Liu, SS; Fang, Y; Yan, ZF; Ge, W; Xue, JM; Zhang, J; Wang, JY; Huang, Q; Ewing, RC; Wang, YG; Wang, YG (reprint author), Peking Univ, Ctr Appl Phys & Technol, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.
	2018-02-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	144 页码:432-446
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.; 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.
部门归属	[wang, chenxu ; yang, tengfei ; xiao, jingren ; liu, shaoshuai ; fang, yuan ; yan, zhanfeng ; ge, wei ; xue, jianming ; wang, yugang] peking univ, ctr appl phys & technol, state key lab nucl phys & technol, beijing 100871, peoples r china ; [wang, chenxu ; tracy, cameron l. ; ewing, rodney c.] stanford univ, dept geol sci, stanford, ca 94305 usa ; [zhang, jie ; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china ; [huang, qing] chinese acad sci, ningbo inst mat technol & engn, ningbo 315201, zhejiang, peoples r china
关键词	Augmented-wave Method Max Phases Structural Transitions Electronic-structure Damage Evolution Ti3alc2 Ti2alc Ti3sic2 Ceramics Ti4aln3
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	National Magnetic Confinement Fusion Energy Research Project of China [2015GB113000]; National Natural Science Foundation of China [11675005]; Energy Frontier Research Center "Materials Science of Actinides" - U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences [DE-SC0001089]; National Science Foundation [ECCS-1542152]
收录类别	SCI
语种	英语
WOS记录号	WOS:000424067100040
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79549
专题	中国科学院金属研究所
通讯作者	Wang, YG (reprint author), Peking Univ, Ctr Appl Phys & Technol, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.
推荐引用方式 GB/T 7714	Wang, CX,Yang, TF,Tracy, CL,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	Wang, CX.,Yang, TF.,Tracy, CL.,Xiao, JR.,Liu, SS.,...&Wang, YG .(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	Wang, CX,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.