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Volume 27 Issue 2
Feb.  2001
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Journal of Beijing University of Aeronautics and Astronautics  > 2001  >  27(2): 125-128.
WANG Wei, SHI Jing-yu, ZHANG Yong-gang, et al. Cycling Oxidation Behavior of Nb-ion Implanted γ-TiAl[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(2): 125-128. (in Chinese)
Citation: WANG Wei, SHI Jing-yu, ZHANG Yong-gang, et al. Cycling Oxidation Behavior of Nb-ion Implanted γ-TiAl[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(2): 125-128. (in Chinese)
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Cycling Oxidation Behavior of Nb-ion Implanted γ-TiAl

  • 1.

    Beijing University of Aeronautics and Astronautics, Dept. of Materials Science and Engineering

  • 2. Beijing Normal University, Low Energy Nuclear Physics Institute

  • Received Date: 29 Oct 1999
  • Publish Date: 28 Feb 2001
    Abstract
  • The thermal cycling oxidation behaviors of Nb-ion implanted γ-TiAl in air were studied in the temperature range of 1123~1173K. The microstructures of the oxide scales were examined by SEM equipped with EDS. Nb distribution and depth profiles of elements were analyzed by AES. The results indicated that the cyclic oxidation resistance of γ-TiAl alloy could be improved by Nb ion implantation. The reason why Nb-ion implantation improves the cyclic oxidation properties may be ascribed to doping of the titania lattice by Nb5+ ions, which may inhibit the growth of TiO2 and enhance the growth rate of Al2O3. The formation of Al2O3 protective layer at the early stage decreased the oxidation rate and delayed the spallation of oxide scale. But Nb-ion implanted γ-TiAl has no long effect to thermal cycling oxidation resistance.

     

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    • References(1)
  • [1] kim Y W, Dimiduk D M. Progress in the understanding of gamma titanium aluminides[J]. JOM, 1991,43(8):40~47. [2] 王贻华,胡正琼. 离子注入与分析基础[M]. 北京:航空工业出版社,1992.4~5. [3] Stroosnijder M F. Ion implantation for high temperature corrosion protection[J]. Surf Coat Technol, 1998,100-101:191~201. [4] Meier G H, Pettit F S. The oxidation behavior of intermetallic compounds[J]. Mater Sci Eng,1992,A153:548~560. [5] Lang C, Schutze M. TEM investigations of the early stages of TiAl oxidation[J]. Oxid Met, 1996,46(3-4):255~285. [6] Becker S,Rahmel A,Schorr M,et al.Mechanism of isothermal oxidation of the intermetallic TiAl and of TiAl alloys[J]. Oxid Met,1992,38(5-6):425~464. [7] Dettenwanger F, Schumann E, Ruhle M,et al. Microstructural study of oxidized γ-TiAl[J]. Oxid.Met,1998,50(3-4):269~307. [8] Hauffe K. Oxidation of metals[M]. New York:Plenum Press, 1965, 217.
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