Influence of Al2O3 nanoparticles on the thermal stability of ultra-fine grained copper prepared by high pressure torsion

被引:6
作者
Cízek, J
Procházka, I
Kuzel, R
Islamgaliev, RK
机构
[1] Charles Univ Prague, Fac Math & Phys, CZ-18000 Prague, Czech Republic
[2] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia
来源
MONATSHEFTE FUR CHEMIE | 2002年 / 133卷 / 06期
关键词
nanostructures; spectroscopy; positron annihilation;
D O I
10.1007/s007060200059
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Ultra-fine grained (UFG) Cu (grain size 80 nm) containing 0.5 wt.% Al2O3 nanoparticles (size 20nm) was prepared by high pressure torsion (HPT). Positron lifetime spectroscopy was employed to characterize the microstructure of this material, especially with respect to types and concentration of lattice defects. The evolution of microstructure with increasing temperature was studied by positron lifetime spectroscopy and X-ray diffraction measurements. The thermal stability of the Cu + 0.5 wt.% Al2O3 nanocomposite was compared with that of pure UFG Cu prepared by the same technique. The processes taking place during thermal recovery of the initial nanoscale structure in both studied materials are described.
引用
收藏
页码:873 / 887
页数:15
相关论文
共 28 条
  • [11] *ICDD, PDF 2 POWD DIFFR PAT
  • [12] Islamgaliev RK, 2000, NATO SCI S PRT 3 HI, V80, P297
  • [13] Thermal stability of submicron grained copper and nickel
    Islamgaliev, RK
    Chmelik, F
    Kuzel, R
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 237 (01): : 43 - 51
  • [14] Kuzel R, 2001, MATER SCI FORUM, V378-3, P463, DOI 10.4028/www.scientific.net/MSF.378-381.463
  • [15] KUZEL R, 1995, DIFPATAN PROGRAM POW
  • [16] KUZEL R, METAL 2001
  • [17] POSITRON TRAPPING AT DISLOCATIONS IN COPPER
    MCKEE, BTA
    SAIMOTO, S
    STEWART, AT
    STOTT, MJ
    [J]. CANADIAN JOURNAL OF PHYSICS, 1974, 52 (09) : 759 - 765
  • [18] Application of maximum-likelihood method to decomposition of positron-lifetime spectra to finite number of components
    Prochazka, I
    Novotny, I
    Becvar, F
    [J]. POSITRON ANNIHILATION: ICPA-11 - PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON POSITRON ANNIHILATION, KANSAS CITY, MISSOURI, USA, MAY 1997, 1997, 255-2 : 772 - 774
  • [19] The contrast factors of dislocations in cubic crystals:: the dislocation model of strain anisotropy in practice
    Ungár, T
    Dragomir, I
    Révész, A
    Borbély, A
    [J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1999, 32 : 992 - 1002
  • [20] Ungár T, 1999, PHYS STATUS SOLIDI A, V171, P425, DOI 10.1002/(SICI)1521-396X(199902)171:2<425::AID-PSSA425>3.0.CO