Ti3AlC2, a candidate structural material for innovative nuclear energy system: The microstructure phase transformation and defect evolution induced by energetic heavy-ion irradiation

doi:10.1016/j.actamat.2020.03.008

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	Ti3AlC2, a candidate structural material for innovative nuclear energy system: The microstructure phase transformation and defect evolution induced by energetic heavy-ion irradiation
	Deng, Tianyu ; Sun, Jianrong ; Tai, Pengfei ; Wang, Yuyu ; Zhang, Linqi ; Chang, Hailong ; Wang, Zhiguang ; Niu, Lijuan ; Sheng, Yanbin ; Xue, Desheng
刊名	ACTA MATERIALIA
	2020
卷号	189 页码:188-203
关键词	MAX PHASES MATERIALS CHALLENGES NEUTRON-IRRADIATION RAMAN-SCATTERING TI2ALC TI3SIC2 PERFORMANCE RESISTANCE TRANSITIONS TOLERANCE
DOI	10.1016/j.actamat.2020.03.008
英文摘要	For the structure materials applied in the innovative nuclear energy system, the strongly environment radiation source is always a big concern which will severely degrade the materials performance especially at high temperature. To explore the mechanisms of the anti-irradiation properties in Ti3AlC2 , a typical MAX phase material showing excellent irradiation damage tolerance and resistance to amorphization, we conducted a series of 1 MeV C4(+) ions irradiation experiments on them at different temperatures (RT, 300 degrees C, 500 degrees C and 800 degrees C). Through Grazing Incidence X-ray Diffraction (GIXRD), Raman spectra (Raman), slow positron annihilation Doppler Broadening Spectroscopy (DBS) and high resolution Transmission Electron Microscopy (HRTEM), the anti-irradiation properties were systematically investigated. For the first time, an entire microstructure phase transformation process of Ti3AlC2 from alpha to beta to gamma and to perfect fee structure phase induced by irradiation at RT and it is inverse (recovery) process of phase transformation under high temperature (>= 300 degrees C) irradiation conditions are found and confirmed. And lots of simple vacancies are induced by irradiation and the density of them gets saturated above 5 x 10(15) ions/cm(2) fluences. These processes of phase transformation and recovery and vacancy saturation phenomenon are the primary reasons for why Ti3AlC2 has excellent irradiation damage tolerance and resistance to amorphization. In addition, the micro strain and lattice parameters are also affected by microstructure transformation and have been discussed. In a word, Ti3AlC2 materials show good anti-irradiation properties especially at high temperature, and now it is a primary candidate as the coating of the cladding material and the spallation target beam windows material in Chinese ADS project. And studies on this kind of materials provide a promising new concept and way for designing the structural materials for innovative nuclear energy system. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
学科主题	Materials Science ; Metallurgy & Metallurgical Engineering
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19714]
专题	2020专题
作者单位	1.Sun, JR 2.Wang, ZG (corresponding author), Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Deng, Tianyu,Sun, Jianrong,Tai, Pengfei,et al. Ti3AlC2, a candidate structural material for innovative nuclear energy system: The microstructure phase transformation and defect evolution induced by energetic heavy-ion irradiation[J]. ACTA MATERIALIA,2020,189:188-203.
APA	Deng, Tianyu.,Sun, Jianrong.,Tai, Pengfei.,Wang, Yuyu.,Zhang, Linqi.,...&Li, Jinyu.(2020).Ti3AlC2, a candidate structural material for innovative nuclear energy system: The microstructure phase transformation and defect evolution induced by energetic heavy-ion irradiation.ACTA MATERIALIA,189,188-203.
MLA	Deng, Tianyu,et al."Ti3AlC2, a candidate structural material for innovative nuclear energy system: The microstructure phase transformation and defect evolution induced by energetic heavy-ion irradiation".ACTA MATERIALIA 189(2020):188-203.