Evolution of irradiation defects in Ti2AlC ceramics during heavy ion irradiation

Wang, Fei; Su, Qing; Nastasi, Michael; Kirk, Marquis A.; Li, Meimei; Cui, Bai

doi:10.1016/j.ceramint.2018.05.095

Title: Evolution of irradiation defects in Ti₂AlC ceramics during heavy ion irradiation

Abstract

Here, the evolution of irradiation defects in Ti₂AlC under Kr ion irradiation at room and elevated temperatures has been investigated. The dependence of defect size and density on the irradiation dose and temperature was characterized by in-situ transmission electron microscopy (TEM) irradiation experiments. At 25-800 °C, interstitial-type dislocation loops with several nanometers in diameter form on the basal plane of Ti₂AlC mostly with a Burgers vector of 1/2[0 0 0 1], and no voids have been observed. The number density of dislocation loops approaches saturation at a level of about 2 dpa at 800 °C. Ti₂AlC samples remain crystalline in structure without amorphization or phase transformation. However, the localized disorder of atomic positions on the basal plane of the irradiated Ti₂AlC was revealed by high-resolution transmission electron microscopy (HRTEM) studies, which increases with irradiation dose while decreases with elevated temperatures.

Authors:

Wang, Fei ^[1]; Su, Qing ^[1]; Nastasi, Michael ^[1]; Kirk, Marquis A. ^[2]; Li, Meimei ^[2]; Cui, Bai ^[1]

Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: 2018-05-19

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: National Science Foundation (NSF); USDOE Office of Nuclear Energy (NE)

OSTI Identifier:: 1482551

Alternate Identifier(s):: OSTI ID: 1495290

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Ceramics International

Additional Journal Information:: Journal Volume: 44; Journal Issue: 12; Journal ID: ISSN 0272-8842

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; In-situ TEM; Irradiation defects; MAX phases; Ti2AlC

Citation Formats


                    Wang, Fei, Su, Qing, Nastasi, Michael, Kirk, Marquis A., Li, Meimei, and Cui, Bai. Evolution of irradiation defects in Ti2AlC ceramics during heavy ion irradiation.  United States: N. p., 2018. 
Web.  doi:10.1016/j.ceramint.2018.05.095.

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                    Wang, Fei, Su, Qing, Nastasi, Michael, Kirk, Marquis A., Li, Meimei, & Cui, Bai. Evolution of irradiation defects in Ti2AlC ceramics during heavy ion irradiation.  United States.  https://doi.org/10.1016/j.ceramint.2018.05.095

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                    Wang, Fei, Su, Qing, Nastasi, Michael, Kirk, Marquis A., Li, Meimei, and Cui, Bai. Sat .  
"Evolution of irradiation defects in Ti2AlC ceramics during heavy ion irradiation".  United States.  https://doi.org/10.1016/j.ceramint.2018.05.095.  https://www.osti.gov/servlets/purl/1482551.

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@article{osti_1482551,

  title        = {Evolution of irradiation defects in Ti2AlC ceramics during heavy ion irradiation},

  author       = {Wang, Fei and Su, Qing and Nastasi, Michael and Kirk, Marquis A. and Li, Meimei and Cui, Bai},

  abstractNote = {Here, the evolution of irradiation defects in Ti2AlC under Kr ion irradiation at room and elevated temperatures has been investigated. The dependence of defect size and density on the irradiation dose and temperature was characterized by in-situ transmission electron microscopy (TEM) irradiation experiments. At 25-800 °C, interstitial-type dislocation loops with several nanometers in diameter form on the basal plane of Ti2AlC mostly with a Burgers vector of 1/2[0 0 0 1], and no voids have been observed. The number density of dislocation loops approaches saturation at a level of about 2 dpa at 800 °C. Ti2AlC samples remain crystalline in structure without amorphization or phase transformation. However, the localized disorder of atomic positions on the basal plane of the irradiated Ti2AlC was revealed by high-resolution transmission electron microscopy (HRTEM) studies, which increases with irradiation dose while decreases with elevated temperatures.},

  doi          = {10.1016/j.ceramint.2018.05.095},

  journal      = {Ceramics International},

  number       = 12,

  volume       = 44,

  place        = {United States},

  year         = {2018},

  month        = {5}

}

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Table 1: The fraction of structure disorder area on (0 0 0 1) plane of Ti₂AlC as a function of irradiation dose and temperature.

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Title: Evolution of irradiation defects in Ti2AlC ceramics during heavy ion irradiation

Abstract

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Title: Evolution of irradiation defects in Ti₂AlC ceramics during heavy ion irradiation