Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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The Effect of $Y_2O_3$ Dispersoids on the High Temperature Oxidation of Ti-34wt%Al-1.5wt%Mn Alloys

Ti-34wt%Al-1.5wt%Mn 합금의 고온산화에 미치는 $Y_2O_3$ 분산입자 첨가효과

  • Lee, Dong-Bok (School of Advanced Materials Science & Engineering, Sungkyunkwan University)
  • 이동복 (성균관대학교 신소재공학부)
  • Published : 2006.12.31
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Abstract

Alloys of TiAl-Mn-(0, 5, 10)wt.% $Y_2O_3$ were prepared by a powder metallurgical route, and their oxidation behavior was studied at 800, 900 and $1000^{\circ}C$ in 1 atm of air. The scale formed on the alloys consisted of $TiO_2$ and $Al_2O_3$ oxides. During oxidation, Mn tended to diffuse outward, whereas oxygen diffused inward. The dispersoids of $T_2O_3$, which segregated at the matrix grain boundaries, acted as a diffusion channel for cations and oxygen ions, nucleation sites for oxides, and vacancy annihilation sites. $T_2O_3$ increased the scale thickness, but improved the scale adherence.

Keywords

References

  1. H. A. Lipsitt, Proc. of MRS Symp, Vol. 39, C. C. Koch, C. T. Liu, N. S. Stoloff (Ed.), MRS, Boston, USA (1985) 351
  2. Y. W. Kim, J. Met., 46(July) (1994) 30
  3. K. Kasahara, K. Hashimoto, H. Doi, T. Tsujimoto, J. Japan Inst. Met., 54 (1990) 948 https://doi.org/10.2320/jinstmet1952.54.8_948
  4. Y. Shida, H. Anada, Oxid. Met., 45 (1996) 197 https://doi.org/10.1007/BF01046826
  5. K. Shibue, M. Kumagai, M. S. Kim, J. Japan Inst. Met., 56 (1992) 1457 https://doi.org/10.2320/jinstmet1952.56.12_1457
  6. Y. Wu, S. K. Hwang, Acta Mater., 50 (2002) 1479 https://doi.org/10.1016/S1359-6454(02)00006-X
  7. Y. Wu, S. K. Hwang, Mater. Lett., 58 (2004) 2067 https://doi.org/10.1016/j.matlet.2003.12.036
  8. Y. Wu, K. Hagihara, Y. Umakoshi, Intermetallics, 12 (2004) 519 https://doi.org/10.1016/j.intermet.2004.01.008
  9. M. K. Lei, X. P. Zhu, X. J. Wang, Oxid. Met., 58 (2002) 361 https://doi.org/10.1023/A:1020162922745
  10. J. X. Song, Y. F. Han, C. B. Xiao, Mater. Sci. Forum, 475/479 (2005) 767
  11. D. B. Lee, Y. D. Jang, M. Nakamura, Mater. Trans., 43 (2002) 2531 https://doi.org/10.2320/matertrans.43.2531
  12. Y. Kobayashi, F. Tsukihashi, Metall. Trans., B29 (1998) 1037