Metals and Materials International

, Volume 7, Issue 2, pp 143–149 | Cite as

Cyclic oxidation behavior of TiAl composites incorporated with TiB2 dispersoids

  • D. B. Lee
  • M. H. Kim
  • S. E. Kim
  • J. Y. Lee
  • K. B. Park
  • J. J. Moon
  • S. C. Choi
  • C. W. Yang
Article

Abstract

TiAl alloys incorporated in (0,3,5,10) wt.% TiB2 dispersoids were manufactured via mechanical alloyingspark plasma sintering (MA-SPS), and their cyclic oxidation characteristics were studied at 800, 900 and 1000°C in air. The cyclic oxidation resistance of the prepared TiAl-TiB2 composites effectively increased with increases in TiB2 content. The oxide scale formed consisted of an outer TiO2 layer, an intermediate Al2O3 layer, and an inner (Al2O3+TiO2) mixed layer. The scale adherence was relatively good, and much thinner oxide scales, when compared to TiB2-free TiAl alloys, were formed on the prepared composites. The incorporated TiB2 dispersoids oxidized to TiO2 and B2O3 which evaporated during oxidation.

Keywords

TiAl intermetallics TiB2 dispersoid oxidation 
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Copyright information

© Springer 2001

Authors and Affiliations

  • D. B. Lee
    • 1
  • M. H. Kim
    • 1
  • S. E. Kim
    • 2
  • J. Y. Lee
    • 1
  • K. B. Park
    • 1
  • J. J. Moon
    • 1
  • S. C. Choi
    • 3
  • C. W. Yang
    • 1
  1. 1.School of Metallurgical and Materials EngineeringSungkyunkwan UniversitySuwonKorea
  2. 2.Department of Materials Processing EngineeringKorea Institute of Machinery and MaterialsChangwonKorea
  3. 3.R&D DivisionKorea Gas Safety CorporationShiheungKorea

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