Helium bubble formation in ultrafine and nanocrystalline tungsten under different extreme conditions
作者： O. El-Atwani , K. Hattar , J.A. Hinks , G. Greaves , S.S. Harilal
DOI: 10.1016/J.JNUCMAT.2014.12.095
关键词: Liquid bubble 、 Grain boundary 、 Transmission electron microscopy 、 Nanocrystalline material 、 Helium 、 Tungsten 、 Irradiation 、 Materials science 、 Vacancy defect 、 Crystallography 、 Chemical physics
摘要: Abstract We have investigated the effects of helium ion irradiation energy and sample temperature on performance grain boundaries as sinks in ultrafine grained nanocrystalline tungsten. Irradiations were performed at displacement non-displacement energies temperatures above below that required for vacancy migration. Microstructural investigations using Transmission Electron Microscopy (TEM) combined with either in-situ or ex-situ irradiation. Under an which does not cause atomic displacements tungsten (70 eV), regardless thus migration conditions, bubbles uniformly distributed no preferential bubble formation boundaries. At can displacements, observed to be preferentially formed only high where occurs. these decoration large facetted occurred grains dimensions less than 60 nm. discuss importance supply radiation-induced defects resulting tolerance formation.
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Tong D. Shen, Shihai Feng, Ming Tang, James A. Valdez, Yongqiang Wang, Kurt E. Sickafus, Enhanced radiation tolerance in nanocrystalline MgGa2O4 Applied Physics Letters. ,vol. 90, pp. 263115- ,(2007) , 10.1063/1.2753098
M. W. Finnis, A. Van Veen, L. M. Caspers, The energy of helium filled platelets and bubbles in molybdenum Radiation Effects and Defects in Solids. ,vol. 78, pp. 121- 132 ,(1983) , 10.1080/00337578308207365
M.J. Baldwin, R.P. Doerner, Formation of helium induced nanostructure ‘fuzz’ on various tungsten grades Journal of Nuclear Materials. ,vol. 404, pp. 165- 173 ,(2010) , 10.1016/J.JNUCMAT.2010.06.034
B. Lipschultz, X. Bonnin, G. Counsell, A. Kallenbach, A. Kukushkin, K. Krieger, A. Leonard, A. Loarte, R. Neu, R.A. Pitts, T. Rognlien, J. Roth, C. Skinner, J.L. Terry, E. Tsitrone, D. Whyte, S. Zweben, N. Asakura, D. Coster, R. Doerner, R. Dux, G. Federici, M. Fenstermacher, W. Fundamenski, P. Ghendrih, A. Herrmann, J. Hu, S. Krasheninnikov, G. Kirnev, A. Kreter, V. Kurnaev, B. LaBombard, S. Lisgo, T. Nakano, N. Ohno, H.D. Pacher, J. Paley, Y. Pan, G. Pautasso, V. Philipps, V. Rohde, D. Rudakov, P. Stangeby, S. Takamura, T. Tanabe, Y. Yang, S. Zhu, Plasma-surface interaction, scrape-off layer and divertor physics:Implications for ITER Nuclear Fusion. ,vol. 47, pp. 1189- 1205 ,(2007) , 10.1088/0029-5515/47/9/016
James F. Ziegler, M.D. Ziegler, J.P. Biersack, SRIM – The stopping and range of ions in matter (2010) Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms. ,vol. 268, pp. 1818- 1823 ,(2010) , 10.1016/J.NIMB.2010.02.091
Alfred Wagner, David N. Seidman, Range Profiles of 300- and 475-eVHe+4Ions and the Diffusivity ofHe4in Tungsten Physical Review Letters. ,vol. 42, pp. 515- 518 ,(1979) , 10.1103/PHYSREVLETT.42.515
C Sun, M Song, KY Yu, Y Chen, M Kirk, M Li, H Wang, X Zhang, None, In situ Evidence of Defect Cluster Absorption by Grain Boundaries in Kr Ion Irradiated Nanocrystalline Ni Metallurgical and Materials Transactions A. ,vol. 44, pp. 1966- 1974 ,(2013) , 10.1007/S11661-013-1635-9
F. Dausinger, H. Schultz, Long-Range Migration of Self-Interstitial Atoms in Tungsten Physical Review Letters. ,vol. 35, pp. 1773- 1775 ,(1975) , 10.1103/PHYSREVLETT.35.1773
Faiza Sefta, Karl D. Hammond, Niklas Juslin, Brian D. Wirth, Tungsten surface evolution by helium bubble nucleation, growth and rupture Nuclear Fusion. ,vol. 53, pp. 073015- ,(2013) , 10.1088/0029-5515/53/7/073015
Q WEI, H ZHANG, B SCHUSTER, K RAMESH, R VALIEV, L KECSKES, R DOWDING, L MAGNESS, K CHO, Microstructure and mechanical properties of super-strong nanocrystalline tungsten processed by high-pressure torsion Acta Materialia. ,vol. 54, pp. 4079- 4089 ,(2006) , 10.1016/J.ACTAMAT.2006.05.005