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Scale growth process at 1473 K on unmodified and yttrium- or chromium-implanted B-NiAl / J. Jedlinski in Materials and corrosion, Vol. 62 N° 6 (Juin 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 6 (Juin 2011) . - pp. 490–495 Titre : Scale growth process at 1473 K on unmodified and yttrium- or chromium-implanted B-NiAl Type de document : texte imprimé Auteurs : J. Jedlinski, Auteur ; J.-L. Grosseau-Poussard, Auteur ; Bonnet, G., Auteur Année de publication : 2011 Article en page(s) : pp. 490–495 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : β-NiAl  Y-  and  Cr-  additions  scale  growth  mechanism Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux 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 [article] Scale growth process at 1473 K on unmodified and yttrium- or chromium-implanted B-NiAl [texte imprimé] / J. Jedlinski, Auteur ; J.-L. Grosseau-Poussard, Auteur ; Bonnet, G., Auteur . - 2011 . - pp. 490–495. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 6 (Juin 2011) . - pp. 490–495 Mots-clés : β-NiAl  Y-  and  Cr-  additions  scale  growth  mechanism Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux 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