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Isothermal oxidation behavior of a precipitation-hardened Pt-base alloy with additions of Al, Cr and Ni

  • Markus Wenderoth , Stefan Vorberg , Bernd Fischer , Rainer Völkl and Uwe Glatzel
Published/Copyright: May 23, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 98 Issue 6

Abstract

The oxidation behavior of a precipitation-hardened Pt-base alloy with 12 at.% Al, 6 at.% Cr and 5 at.% Ni was examined. At high temperatures in air this alloy forms an alumina scale and a precipitate-free layer underneath, both growing according to parabolic functions of time. Small amounts of Ni embedded in the oxide scale accelerate its growth in the initial phase of oxidation. With time, oxidation is retarded due to decreasing impurity concentration and grain coarsening in the oxide scale. The interdiffusion coefficients of the scale-forming element Al in the Pt-rich solid solution matrix are estimated.

Keywords: Diffusion; Oxidation; Platinum; Precipitation; Superalloy
* Correspondence address, Prof. Dr.-Ing. Uwe Glatzel, University of Bayreuth, Metals & Alloys, Ludwig-Thoma-Str. 36B, D-95447 Bayreuth, Germany, Tel.: +49 921 555 555, Fax: +49 921 555 561, E-mail:

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Received: 2006-10-5
Accepted: 2006-2-6
Published Online: 2013-05-23
Published in Print: 2007-06-01

© 2007, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.101498
Keywords for this article
Diffusion; Oxidation; Platinum; Precipitation; Superalloy

Articles in the same Issue

  1. Contents
  2. Contents
  3. Basic
  4. The effect of bismuth segregation on the faceting of Σ3 and Σ9 coincidence boundaries in copper bicrystals
  5. Viscosity measurement of liquid ternary Cu–Ni–Fe alloys by an oscillating cup viscometer and comparison with models
  6. Isothermal oxidation behavior of a precipitation-hardened Pt-base alloy with additions of Al, Cr and Ni
  7. Bismuth activity measurements and thermodynamic re-optimization of the Ni–Bi System
  8. Modelling of the β → α + β transformation in a metastable β Ti alloy based on the growth kinetics and the morphology of the α plates
  9. The microstructure of ball milled nanocrystalline vanadium; variation of the crystal imperfection and the lattice parameter
  10. Study of interfacial reactions between Sn–Ag–Cu alloys and Au substrate
  11. Applied
  12. On the precipitation processes in commercial QE22 magnesium alloy
  13. Cyclic deformation behavior of deep rolled as-quenched aluminium alloy AA6110 at elevated temperatures
  14. Effect of Ho additions on the microstructure and mechanical properties of Nb-22Ti-16Si-7Cr-3Al-3Ta-2Hf alloys
  15. Improved mechanical properties of the high pressure die casting alloy AlSi9Cu3(Fe)(Zn) as a result of the combination of natural and artificial ageing
  16. Effect of quenching temperature on the microstructure and mechanical properties of Fe–B–Ti alloy
  17. A kinetic study of nickel coating on boron nitride micro-particles
  18. Thermal diffusivity measurements of some industrially important alloys by a laser flash method
  19. Notifications
  20. DGM News
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