Ultra Fine-Grained Metals Prepared by Severe Plastic Deformation: A Positron Annihilation Study

• Authors: J. Čížek , I. Procházka , R. Kužel , Z. Matĕj , V. Cherkaska , M. Cieslar , B. Smola , I. Stulíková , G. Brauer , W. Anwand , R. Islamgaliev , O. Kulyasova
• Languages of publication: EN

Abstracts

EN

Recent investigations of ultra fine-grained metals (Cu, Fe, Ni) performed within a Prague-Rossendorf-Ufa collaboration will be reviewed. The specimens were prepared by severe plastic deformation: the high-pressure torsion and equal channel angular pressing. Positron annihilation spectroscopy was used as the main method including (i) the conventional lifetime and the Doppler broadening measurements with ^{22}Na and (ii) the slow-positron implantation spectroscopy with the Doppler broadening measurement. Other methods were also involved: transmission electron microscopy, X-ray diffraction, and microhardness. First, the mean grain size was determined and defects were identified in the as-deformed materials. Defects concentration and spatial distribution were studied in detail. Dislocations situated in distorted regions along grain boundaries, and a few-vacancy clusters distributed homogeneously inside dislocations-free grains, were observed in the ultra fine-grained Cu, Fe, and Ni. Subsequently, the thermal evolution of the ultra fine-grained structures during isochronal annealing was studied.

Keywords

EN

78.70.Bj; 79.60.Jv

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 79.60.Jv: Interfaces; heterostructures; nanostructures

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 5
• Pages: 745-752

Dates

published

2005-05

received

2004-09-20

Contributors

author

J. Čížek

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 180 00 Praha 8, Czech Republic

author

I. Procházka

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 180 00 Praha 8, Czech Republic

author

R. Kužel

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 180 00 Praha 8, Czech Republic

author

Z. Matĕj

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 180 00 Praha 8, Czech Republic

author

V. Cherkaska

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 180 00 Praha 8, Czech Republic

author

M. Cieslar

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 180 00 Praha 8, Czech Republic

author

B. Smola

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 180 00 Praha 8, Czech Republic

author

I. Stulíková

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 180 00 Praha 8, Czech Republic

author

G. Brauer

• Institut für Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, Dresden, Germany

author

W. Anwand

• Institut für Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, Dresden, Germany

author

R. Islamgaliev

• Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, Russia

author

O. Kulyasova

• Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, Russia

References

• 1. Nanomaterials by Severe Plastic Deformation, Proc. Conf. 'Nanomaterials by Severe Plastic Deformation - NANOSPD2', Vienna 2002, Eds. M. Zehetbauer, R.Z. Valiev, Wiley-VCH Verlag GmbH Co. KgaA, Weinheim 2004
• 2. R.Z. Valiev, R.K. Islamgaliev, I.V. Aleksandrov, Prog. Mater. Sci., 45, 103, 2000
• 3. P. Hautojarvi, C. Corbel, in: Positron Spectroscopy of Solids, Proc. Int. School of Physics 'Enrico Fermi', Course CXXV, Eds. A. Dupasquier, A.P. Mills, Jr., Varenna (Italy) 1993, IOS Press, Amsterdam 1995, p. 491
• 4. J. Cízek, I. Procházka, B. Smola, I. Stulí ková, R. Ku zel, Z. Matej, V. Cherkaska, R.K. Islamgaliev, O. Kulyasova, Acta Phys. Pol. A, 107, 738, 2005
• 5. F. Becvár, J. Cízek, L. Lesták, I. Novotný, I. Procházka, F. Sebesta, Nucl. Instrum. Methods Phys. Res. A, 443, 557, 2000
• 6. W. Anwand, H.-R. Kissener, G. Brauer, Acta Phys. Pol. A, 88, 7, 1995
• 7. A. van Veen, H. Schut, M. Clement, J. de Nijs, A. Kruseman, M. Ijpma, Appl. Surf. Sci., 85, 216, 1995
• 8. J. Cízek, I. Procházka, M. Cieslar, R. Kuzel, J. Kuriplach, F. Chmelik, I. Stulíková, F. Becvár, O. Melikhova, Phys. Rev. B, 65, 094106, 2000
• 9. J. Cízek, I. Procházka, G. Brauer, W. Anwand, R. Kuzel, M. Cieslar, R.K. Islamgaliev, Phys. Status Solidi A, 195, 335, 2003
• 10. J. Cízek, I. Procházka, M. Cieslar, I. Stulí ková, F. Chmelik, R.K. Islamgaliev, Phys. Status Solidi A, 191, 391, 2002
• 11. J. Cízek, I. Procházka, R. Kuzel, R.K. Islamgaliev, Chem. Monthly, 133, 873, 2002
• 12. J. Cízek, I. Procházka, B. Smola, I. Stulíková, R. Kuzel, M. Cieslar, Z. Matej, V. Cherkaska, G. Brauer, W. Anwand, R.K. Islamgaliev, O. Kulyasova, Mater. Sci. Forum, 482, 207, 2005
• 13. J. Cízek, I. Procházka, R. Kuzel, M. Cieslar, I. Stulíková, in Ref. [1], p. 630
• 14. T.E.M. Staab, R. Kause-Rehberg, B. Kieback, J. Mater. Sci., 34, 3833, 1999
• 15. A. van den Beukel, in: Proc. Int. Conf. on Vacancies and Interstitials in Metals, Eds. A. Seeger, D. Schumacher, W. Schilling, J. Diehl, North-Holland, Amsterdam 1970, p. 427
• 16. A. Hempel, A. Saneyasu, Z. Tang, M. Hasegawa, G. Brauer, F. Plazaola, S. Yamaguchi, in: Effects of Radiation on Materials, 19th Int. Symp. ASTM STP 1366, Eds. A.B. Smith, C.D. Jones, American Society for Testing Materials, West Conshohocken 1998, p. 132

Identifiers

DOI

10.12693/APhysPolA.107.745