| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
|
|
|
|
Influence of Temperature and Stress on Near-Surface Cascades in Alpha-Zirconium Revealed by Molecular Dynamics Simulation |
| WU Tian-Yu, PENG Meng-Meng, LUO Xiao-Feng, LAI Wen-Sheng** |
Laboratory of Advanced Materials, School of Material Science and Engineering, Tsinghua University, Beijing 100084
|
|
| Cite this article: |
|
WU Tian-Yu, PENG Meng-Meng, LUO Xiao-Feng et al 2013 Chin. Phys. Lett. 30 096106 |
|
|
|
|
Abstract Molecular dynamics simulations are used to study cascades near the surface in hcp Zr. The influences of several factors, namely the primary knock-on atom (PKA) in different layers, angle of incidence, temperature and stress, on the number and type of defects are considered. Compared to bulk cascades, near-surface cascades show different characteristics in defect type and quantity when the PKA is in different layers. Low angle incidences create surface sputtering while the effects of high angle incidences are similar to those of bulk cascades. The effect of temperature is mainly focused on the number of sputtered atoms, with little influence on the total number of surviving defects. Stress helps to create more defects and the influence of compressive stress is more prominent than tensile stress.
|
|
|
Received: 14 June 2013
Published: 21 November 2013
|
|
| PACS: |
61.80.-x
|
(Physical radiation effects, radiation damage)
|
| |
31.15.xv
|
(Molecular dynamics and other numerical methods)
|
| |
34.20.Cf
|
(Interatomic potentials and forces)
|
|
|
|
|
|
[1] Bacon D J, Calder A F, Gao F, Kapinos V G and Wooding S J 1995 Nucl. Instrum. Methods Phys. Res. Sect. Sec. B 102 37
[2] Diaz De La Rubia T and Phythian W J 1992 J. Nucl. Mater. 191 108
[3] Diaz De La Rubia T and Guinan M W 1994 Radiat. Eff. Defects Solids 129 31
[4] Bacon D J and Delarubia T D 1994 J. Nucl. Mater. 216 275
[5] Ghaly M and Averback R S 1994 Phys. Rev. Lett. 72 364
[6] Averback R S and Ghaly M 1994 Nucl. Instrum. Methods Phys. Res. Sect. B 90 191
[7] Averback R S and Ghaly M 1994 J. Appl. Phys. 76 3908
[8] Ghaly M, Averback R S and Delarubia T D 1995 Nucl. Instrum. Methods Phys. Res. Sect. Sec. B 102 51
[9] Karetta F and Urbassek H M 1992 J. Appl. Phys. 71 5410
[10] Wooding S J and Bacon D J 1997 Philos. Mag. A 76 1033
[11] Wooding S J, Howe L M, Gao F, Calder A F and Bacon D J 1998 J. Nucl. Mater. 254 191
[12] Gao F, Bacon D J, Howe L M, Howe L M and So C B 2001 J. Nucl. Mater. 294 288
[13] Diego N D and Bacon D J 1997 Radiat. Eff. Defects Solids 141 337
[14] Diego N D and Bacon D J 2000 Philos. Mag. A 80 1393
[15] Phythian W J, Stoller R E, Foreman A, Calder A F and Bacon D J 1995 J. Nucl. Mater. 223 245
[16] Stoller R E 2000 J. Nucl. Mater. 276 22
[17] Shen L, Kewei G, Lijie Q, Wuyang C and Fuxin Z 2000 Acta Mech. Sin. 16 366
[18] Haslam, A J, Moldovan D, Yamakov V, Wolf D, Phillpot S R and Gleiter H 2003 Acta Mater. 51 2097
[19] Jin L, Wen-Jun Z, Li-Bin L, Hongliang H and Fuqian J 2005 Acta Phys. Sin. 54 2791 (in Chinese)
[20] Finnis M W 1988 UK Atomic Energy Authority Harwell Report No. AERE-R-13182
[21] Wooding S J 1994 Ph. D. Thesis (University of Liverpool)
[22] Mendelev M I and Ackland G J 2007 Philos. Mag. Lett. 87 349
[23] Biersack J P and Ziegler J F 1982 Ion Implantation Techniques (Berlin: Springer) p 122
[24] Moore W T, Watson P R, Frost D C and Mitchell K 1979 J. Phys. C: Solid State Phys. 12 L887
[25] Wang Y M, Li Y S and Mitchell K 1995 Surf. Sci. 343 L1167
[26] Murr L E 1975 Interfacial Phenomena in Metals and Alloys p 387 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
