利用分子动力学方法,通过热峰模型模拟了高能辐照下UO2的损伤过程.通过在单次热峰模拟中设定不同入射温度、不同入射半径的热峰,观察到基体中心区域原子获得了能量.在热激活的作用下以压力波的形式向外层快速传递,在原子大量离位的同时也有大量回复在进行.随入射能量的不同,最终形成了非晶态、半非晶、晶态3种微观结构.模拟结果可以较好地重现热峰辐照的物理过程,能够对在实验上无法观测的微小尺度的变化给予直观的描述.
参考文献
| [1] | 李冠兴;武胜.核材料科学与工程[M].北京:化学工业出版社,2007:317. |
| [2] | Brutzel L;Vincent-Aublant E;Delaye J M .[J].Nuclear Instruments and Methods in Physics Research B:Beam Interaction with Materials and Atoms,2009,267(18):3013. |
| [3] | Bringa EM.;Johnson RE. .Molecular dynamics study of non-equilibrium energy transport from a cylindrical track - I. Test of "spike" models[J].Nuclear Instruments and Methods in Physics Research, Section B. Beam Interactions with Materials and Atoms,1998(4):513-535. |
| [4] | Bringa E M;Johnson R E;Dutkiewicz L .[J].Nuclear Instruments and Methods in Physics Research B:Beam Interaction with Materials and Atoms,1999,152(2-3):267. |
| [5] | Bringa EM.;Wirth BD.;Caturla MJ.;Stolken J.;Kalantar D. .Metals far from equilibrium: From shocks to radiation damage[J].Nuclear Instruments and Methods in Physics Research, Section B. Beam Interactions with Materials and Atoms,2003(0):56-63. |
| [6] | Bringa E M;Traiviratana S;Meyers M A .[J].Acta Materialia,2010,58(13):4458. |
| [7] | Sasajima Y;Akabane T;Nakazawa T et al.Nuclear Instruments and Methods in Physics Research Section B[J].Beam Interactions with Materials and Atoms,2007,264(02):259. |
| [8] | Huang M .Molecular Dynamic Simulation of Xenon Bubble Re-solution in Uranium Dioxide[D].Urbana:University of Illinois,2010. |
| [9] | Govers K;Lemehov S;Hou M;Verwerft M .Comparison of interatomic potentials for UO2 Part II: Molecular dynamics simulations[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2008(1):66-77. |
| [10] | Basak C B;Sengupta A K;Kamath H S .[J].Journal of Alloys and Compounds,2003,360(1-2):210. |
| [11] | Karakasidis T;Lindan P J D .[J].Journal of Physics:Condensed Matter,1994,6:2965. |
| [12] | Morelon N D;Ghaleb D;Delaye J M et al.[J].Philosophical Magazine,2003,83(13):1533. |
| [13] | Walker J R J;Catlow C R A .[J].Journal of Physics C:Solid State Physics,1981,14:979. |
| [14] | Yamada K.;Kurosaki K. .Evaluation of thermal properties of uranium dioxide by molecular dynamics[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):10-16. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%