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Title: Evolution of irradiation defects in Ti 2AlC ceramics during heavy ion irradiation

Abstract

Here, the evolution of irradiation defects in Ti 2AlC 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 Ti 2AlC 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. Ti 2AlC samples remain crystalline in structure without amorphization or phase transformation. However, the localized disorder of atomic positions on the basal plane of the irradiated Ti 2AlC was revealed by high-resolution transmission electron microscopy (HRTEM) studies, which increases with irradiation dose while decreases with elevated temperatures.

Authors:
 [1];  [1];  [1];  [2];  [2];  [1]
  1. Univ. of Nebraska-Lincoln, Lincoln, NE (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
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.
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. doi:10.1016/j.ceramint.2018.05.095.
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. doi:10.1016/j.ceramint.2018.05.095. https://www.osti.gov/servlets/purl/1482551.
@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}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Table 1 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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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.