Thermodynamic Calculations for Studying High Temperature Oxidation of Superalloys - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Calphad Année : 2003

Thermodynamic Calculations for Studying High Temperature Oxidation of Superalloys

P. Berthod
S. Michon
  • Fonction : Auteur
  • PersonId : 790739
  • IdRef : 115873139
S Mathieu
S. Noël
R Podor
C Rapin

Résumé

Microstructure phenomena resulting from high temperature oxidation of a simple nickel alloy and two cobalt-base superalloys were studied by microstructure examinations and thermodynamic calculations. The latter allowed to better quantify what happened to carbon during oxidation, which was not possible with microstructure examination and microanalysis alone, and to explain the microstructure changes due to oxidation. At 1000°C, due to the Cr oxidation, the grain boundary carbides dissolve and the carbon diffuses inwards, where new carbides form. However, at 1100 and 1200°C, the carbon diffuses outwards to the surface. Thermodynamic calculations were used to explain the seemingly different mechanisms of carbon diffusion.

Domaines

Matériaux Chimie
Fichier principal
Vignette du fichier
Calphad2003p279.pdf (2.83 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02398209 , version 1 (07-12-2019)

Identifiants

Citer

P. Berthod, S. Michon, J. Di Martino, S Mathieu, S. Noël, et al.. Thermodynamic Calculations for Studying High Temperature Oxidation of Superalloys. Calphad, 2003, ⟨10.1016/j.calphad.2003.12.002⟩. ⟨hal-02398209⟩
31 Consultations
180 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More