Direct Observation of Nanostructural Fluctuation during Radiation-Induced Amorphization

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An atomistic study of radiation-induced amorphization in the NiTi intermetallic compound was performed by using in-situ high-resolution high-voltage electron microscopy and molecular dynamics in conjunction with image simulations. Both theoretical and experimental results show that metastable nanometer-size inherent atomic clusters form and disappear during irradiation, so that a spatiotemporal fluctuation under amorphization is induced. The random formation and annihilation of such inherent nanoclusters are believed to be responsible for these fluctuations, which appear to be related to transitions between the ideal glass state and metastable, unrelaxed states in an energy-dissipative system under irradiation.

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Periodical:

Materials Science Forum (Volumes 561-565)

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Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

2021-2024

Citation:

S. Watanabe "Direct Observation of Nanostructural Fluctuation during Radiation-Induced Amorphization", Materials Science Forum, Vols. 561-565, pp. 2021-2024, 2007

Online since:

October 2007

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$38.00

[1] P.R. Okamoto, N.Q. Lam, L. E. Rehn, Physics of Crystal-to Glass Transitions, Solid State Physics 52, (Academic Press, New York 1999) 1-135.

[2] H. Mori, H. Fujita, M. Tendo, H. Fujita, Scripta Metall. 18, 783 (1984).

[3] S. Watanabe, T. Koike, T. Suda, S. Ohnuki, H. Takahashi, N.Q. Lam, Phil. Mag. Lett. 81, (2001) 789.

[4] T. Koike, S. Watanabe, M. Hoshino, T. Suda, S. Ohnuki, H. Takahashi, N. Q. Lam, Mater. Trans. 43, (2002) 1716.

[5] S. Watanabe, M. Hoshino, T. Koike, T. Suda, S. Ohnuki, H. Takahashi, N.Q. Lam, Phil. Mag. 83, (2003) 2599.

[6] S. Watanabe, M. Hoshino, T. Koike, T. Suda, S. Ohnuki, H. Takahashi, N.Q. Lam, J. Electron Microsc. 52(1), (2003) 33.

[7] G. Y. Fan, J. M. Cowley, Ultramicroscopy 17, (1985) 345.

[8] S. Muto, S. Horiuchi, T. Tanabe, J. Electron Microsc. 48, (1999)767.

[9] M.J. Sabochick and N.Q. Lam, Mater. Res. Soc. Symp. 201, (1991) 387.

[10] S. Watanabe,T. Koike, T. Suda, S. Ohnuki, H. Takahashi, N. Q. Lam, Mater. Trans. 45 (2004) 24. Fig. 3 (a) in left and (b) in right: ACF patterns of the HREM images in Fig. 1 (a) and (b), respectively.

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