Journal of Materials Science

, Volume 47, Issue 18, pp 6522–6534 | Cite as

Oxidation behavior of a refractory NbCrMo0.5Ta0.5TiZr alloy

  • O. N. Senkov
  • S. V. Senkova
  • D. M. Dimiduk
  • C. Woodward
  • D. B. Miracle


Isothermal oxidation behavior of a refractory high-entropy NbCrMo0.5Ta0.5TiZr alloy was studied during heating at 1273 K for 100 h in flowing air. Continuous weight gain occurred during oxidation, and the time dependence of the weight gain per unit surface area was described by a parabolic dependence with the time exponent n = 0.6. X-ray diffraction and scanning electron microscopy accompanied by energy-dispersive X-ray spectroscopy showed that the continuous oxide scale was made of complex oxides and only local (on the submicron levels) redistribution of the alloying elements occurred during oxidation. The alloy has a better combination of mechanical properties and oxidation resistance than commercial Nb alloys and earlier reported developmental Nb–Si–Al–Ti and Nb–Si–Mo alloys.


Oxide Layer Oxide Scale Lave Phase BCC1 Phase Unit Surface Area 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Technical support from Drs. Carmen Carney and Fred Meisenkothen is greatly appreciated. This work was supported through the Air Force Research Laboratory Director’s Fund and through USAF contract No. FA8650-10-5226.


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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • O. N. Senkov
    • 1
    • 2
  • S. V. Senkova
    • 1
    • 2
  • D. M. Dimiduk
    • 1
  • C. Woodward
    • 1
  • D. B. Miracle
    • 1
  1. 1.Air Force Research Laboratory, Materials and Manufacturing DirectorateWright-Patterson Air Force BaseUSA
  2. 2.UES, IncDaytonUSA

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