1. He+ irradiation induced cracking and exfoliating on the surface of Ti3AlC2.
- Author
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Shen, H.H., Ao, L., Li, F.Z., Peng, S.M., Zhang, H.B., Sun, K., and Zu, X.T.
- Subjects
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HELIUM ions , *IRRADIATION , *CRYSTAL structure , *SURFACE morphology , *SCANNING electron microscopy - Abstract
We report a systematic study of the effects of a 400 keV helium ion beam irradiation on the surface morphology and crystal structure of Ti 3 AlC 2 by combined scanning electron microscopy, grazing incidence X-ray diffraction and transmission electron microscopy. Helium irradiation experiments were performed at both room temperature and 500 °C, respectively, with fluence up to 2.0 × 10 17 He + /cm 2 . After irradiation, intragranular orientated cracks grew along the (10 1 ¯ 0) Ti3AlC2 plane and the surface has started to exfoliate. The formation of the cracks is mainly attributed to the reduction of the lattice parameter along the a direction induced by ion irradiation, and the crack growth is affected by the grain size and the content of impurity phase TiAl 3 . The surface exfoliation is due to the blistering of He bubbles at the projected depth. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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