Experimental and thermodynamic analysis of differences in phase transformation of Pt-modified nickel aluminide coating during isothermal and cyclic oxidation - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Surface and Coatings Technology Année : 2016

Experimental and thermodynamic analysis of differences in phase transformation of Pt-modified nickel aluminide coating during isothermal and cyclic oxidation

(1) , (1)
1
Vladimir A. Esin
Fabrice Gaslain

Résumé

Phase transformation of Pt-modified nickel aluminide coating β-(Ni,Pt)Al into γ′ phase was studied during isothermal and cyclic oxidation at 1100 °C. The transformation occurred with homogeneous β and γ′ phases with chemical compositions depending on oxidation conditions. Cyclic oxidation led to a higher volume fraction of topologically close-packed (TCP) phases formed in the interdiffusion zone and the chemical composition of TCP phases was found to vary with oxidation conditions. This difference in TCP precipitation in the interdiffusion zone for isothermal and cyclic oxidation was suggested to be responsible for different β and γ′ compositions. The experimental observations were discussed using thermodynamic calculations by Thermo-Calc software, and some explanations were given.
Fichier non déposé

Dates et versions

hal-01421908 , version 1 (23-12-2016)

Identifiants

Citer

Vladimir A. Esin, Fabrice Gaslain. Experimental and thermodynamic analysis of differences in phase transformation of Pt-modified nickel aluminide coating during isothermal and cyclic oxidation. Surface and Coatings Technology, 2016, 307, pp.915-925. ⟨10.1016/j.surfcoat.2016.10.014⟩. ⟨hal-01421908⟩
31 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More