Structural Changes of Ti₃SiC₂ Induced by Helium Irradiation with Different Doses

Abstract

In this study, the microstructure changes of Ti₃SiC₂ MAX phase material induced by helium irradiation and evolution with a sequence of different helium irradiation doses of 5 x 1015, 1 x 1016, 5 x 1016 and 1 x 1017 cm-2 at room temperature (RT) were characterized with grazing incidence X-ray diffraction (GIXRD) and Raman spectra analysis. The irradiation damage process of Ti₃SiC₂ can be roughly divided into three stages according to the level of helium irradiation dose: (1) for a low damage dose, only crystal and damaged Ti₃SiC₂ exit; (2) at a higher irradiation dose, there is some damaged TiC phase additionally; (3) with a much higher irradiation dose, crystal TiC phase could be found inside the samples as well. Moreover, the 450 °C 5 x 1016 cm-2 helium irradiation on Ti₃SiC₂ has confirmed that Ti₃SiC₂ has much higher irradiation tolerance at higher temperature, which implies that Ti₃SiC₂ could be a potential future structural and fuel coating material working at high temperature environments.

Department(s)

Materials Science and Engineering

Comments

The authors thank beamline BL14B1 (Shanghai Synchrotron Radiation Facility) for providing the beam time. The authors gratefully acknowledge the financial support from China Scholarship Council . Our work was also supported by the National Nature Science Foundation of China under grant number 11375046 . We acknowledge the financial support of the Australia/China International Linkage program ( CH080126 ) of the Department of Industry, Innovation and Science Research, Australian Government .

Keywords and Phrases

GIXRD; He Irradiation; Phase Transformation; Ti3SiC2

International Standard Serial Number (ISSN)

0169-4332

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Elsevier B.V., All rights reserved.

Publication Date

01 Mar 2018

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