在液氮低温下用400 keV的Ne2＋离子束对Gd2Ti2O7多晶烧绿石进行了辐照实验研究,离子束辐照量范围为5×1014—1×1016ions/cm2。利用掠X射线衍射技术对样品辐照层的结构变化进行了分析表征,X射线的掠射角分别为γ=0.25°,0.5°,1°和3°。结果表明：在该实验条件的离子束辐照下,Gd2Ti2O7辐照层会发生明显的体积肿胀效应,体积肿胀程度随入射离子束辐照量的增大而增大;在同一辐照量下,辐照层的体积肿胀程度也随X射线入射角的增大而增大。当辐照量达到1×1016ions/cm2时,辐照层发生非晶化相变。
Polycrystalline pyrochlore Gd2Ti2O7 compounds were irradiated with 400 keV Ne2＋ ions at cryogenic temperature（~77 K）.The irradiation fluences was ranging from 5×1014 to 1×1016 ions/cm2,corresponding to a peak ballistic damage dose of ~0.16 to 3.3 displacements per atom dpa.Irradiation-induced structural evolution was examined using grazing incidence X-ray diffraction（GIXRD） at angles from 0.25° to 3° degrees.It was found that the lattice parameter increases as a function of（1） X-ray incident angle and（2） ion irradiation fluence,suggesting that the irradiated layer is volumetrically swelled compared with the underlying un-irradiated substrate.At ion fluence of 1×1016 ions/cm2,the irradiation layer was found to be amorphous.
参考文献
| [1] | Ewing R C, Weber W .], Clinard F W. Progress in Nuclear Energy, 1995, 26: 63. |
| [2] | Ewing R C, Weber W J, Lian J. J Appl Phys, 2004, 95: 5949. |
| [3] | Lian J, Wang L M, Ewing R C, etal. Nucl Instr and Meth, 2005, B241: 365. |
| [4] | Lian J, Chen J, Wang L M, et al. Phys Rev, 2003, B68: 134107. |
| [5] | Lian J, Wang L M, Ewing R C, et al. Nucl Instr and Meth, 2006, B242: 448. |
| [6] | Lian J, Zu X T, Kutty K V G, etal. Phys Rev, 2002, B66: 054108. |
| [7] | WeberWJ, EwingRC, CatlowCRA, etal. J MaterRes, 1998, 13: 1434. |
| [8] | Chen J, Lian J, Wang L M, et al. Appl Phys Lett, 2011, 28 : 06 6102. |
| [9] | LI Y H, XU C P, GAO C, etal. Chin Phys Lett, 2001, 79: 1989. |
| [10] | LI Y H, Uberuaga B P, Jiang C, et al. Nature Materials. (submitted). |
| [11] | Cullity B D. Elements of X-Ray Diffraction (2nd Edition). Massachusetts: Addision-Wesley Publishing Company, Inc. , 1994. 513. |
| [12] | Rafaja D, Valvoda V, Perry A J, et al. Surf Coat Technol, 1997, 92: 135. |
| [13] | Ziegler J F, Biersack J P, Littmark U. The Stopping and Range of Ions in Matter (SRIM)[EB/OL]. [2010-11- 07www. srim. org. |
| [14] | Sickafus K E, Grimes R W, Valdez J A, et al. Nature Materials, 2007, fi: 217. |
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