| Titre : | Scale growth process at 1473 K on unmodified and yttrium- or chromium-implanted B-NiAl (2011) |
| Auteurs : | J. Jedlinski, Auteur ; J.-L. Grosseau-Poussard, Auteur ; Bonnet, G., Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Materials and corrosion (Vol. 62 N° 6, Juin 2011) |
| Article en page(s) : | pp. 490–495 |
| Note générale : | Génie Mécanique |
| Langues : | Anglais |
| Index. décimale : | 620.1 (Essais des matériaux. Défauts des matériaux. Protection des matériaux) |
| Tags : | β ; -NiAl Y- and Cr- additions scale growth mechanism |
| Résumé : |
Early oxidation of unmodified and yttrium-implanted or chromium-implanted β-NiAl intermetallic compound at 1473 K was studied using a combination of two-stage-oxidation exposure with 18O2 as a tracer, SIMS elemental distribution analysis (depth profiling and imaging modes) and photoluminescence spectroscopy analysis of the scale phase composition.
It was found that phase transformation of transient aluminium oxides, represented by θ- Al2O3 into stable and protective α-Al2O3 occurs locally and is affected by implanted additions: Yttrium retarded while chromium appeared to accelerate it. Typical patch- and/or web-like scale morphology of the growing scales was observed. |
| DEWEY : | 620.1 |
| ISSN : | 0947-5117 |
| En ligne : | http://onlinelibrary.wiley.com/doi/10.1002/maco.201005852/abstract |
