Influence of Ceramic Nanoparticles on Thermal Stability of Ultra Fine Grained Copper

• Authors: J. Čížek , I. Procházka , M. Cieslar , R. Islamgaliev , O. Kulyasova
• Languages of publication: EN

Abstracts

EN

A detailed study of the bulk ultra fine grained pure copper and copper with Al_2O_3 particles was carried out in the present work. The specimens were prepared by the high-pressure torsion and their microstructure was investigated by positron lifetime spectroscopy combined with transmission electron microscopy and microhardness tests. Defects in the as-deformed materials were characterized and the thermal stability of the ultra fine grained microstructure was subsequently examined in annealing experiments. An addition of Al_2O_3 nanoparticles was found to improve significantly the thermal stability of the ultra fine grained structure, the optimum content of Al_2O_3 being ≈0.5 wt.%.

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: 2008
• Volume: 113
• Issue: 5
• Pages: 1285-1292

Dates

published

2008-05

received

2007-09-03

Contributors

author

J. Čížek

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

author

I. Procházka

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

author

M. Cieslar

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

author

R. Islamgaliev

• Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa 450 000, Russia

author

O. Kulyasova

• Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa 450 000, Russia

References

• 1. Nanomaterials by Severe Plastic Deformation, Proc. Int. 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, V.S. Aleksandrov, Prog. Mater. Sci. 45, 103 (2000)
• 3. P. Hautojrvi, C. Corbel, in: Positron Spectroscopy of Solids, Proc. Int. School of Physics .Enrico Fermi/, Course CXXV, Varenna (Italy) 1993, Eds. A. Dupasquier, A.P. Mills, Jr., IOS Press, Amsterdam 1995, p. 491
• 4. J. Cizek, I. Prochazka, M. Cieslar, R. Kuzel, J. Kuriplach, F. Chmelik, I. Stulikova, F. Becvar, O. Melikhova, R.K. Islamgaliev, Phys. Rev. B 65, 094106 (2002)
• 5. J. Cizek, I. Prochazka, R. Kuzel, M. Cieslar, R.K. Islamgaliev, J. Metastable Nanocryst. Mater. 17, 37 (2003)
• 6. J. Cizek, I. Prochazka, R. Kuzel, R.K. Islamgaliev, Chemical Monthly 133, 873 (2002)
• 7. F. Becvar, J. Cizek, L. Lestak, I. Novotny, I. Prochazka, F. Sebesta, Nucl. Instrum. Methods Phys. Res. A 443, 557 (2000)
• 8. J. Cizek, I. Prochazka, P. Vostry, F. Chmelik, R.K. Islamgaliev, Acta Phys. Pol. A 95, 487 (1999)

Identifiers

DOI

10.12693/APhysPolA.113.1285