| Titre : |
Microstructure and thermal cycling behavior of thermal barrier coating on near-a titanium alloy |
| Type de document : |
texte imprimé |
| Auteurs : |
Bo He, Auteur ; Fei Li, Auteur ; Hong Zhou, Auteur ; Yongbing Dai, Auteur ; Bao-de Sun, Auteur |
| Année de publication : |
2007 |
| Article en page(s) : |
p. 335-340 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Dépôt en phase vapeur
Matériaux -- Propriétés barrières
Protection thermique
Rayonnement électronique
Titane -- Alliages
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Two kinds of thermal barrier coatings (TBCs), consisting of NiCoCrAlY bond coats (BCs) deposited by electron beam-physical vapor deposition (EB-PVD) and high velocity oxy-fuel (HVOF) thermal spraying, respectively, and top 8 wt%oY2O3-ZrO2 (8YSZ) ceramic layers deposited by EB-PVD were prepared on near-a titanium alloys. The field emission scanning electronic microscopy and microhardness indentation are used to study the microstructure and microhardness. Different failure features including cracking patterns and the delamination degree of these two TBCs are discussed according to the thermal cycling tests in the atmosphere. It is found that the morphology of the two BCs deposited by different methods (EB-PVD and HVOF) determines the microstructure and microhardness of their corresponding top 8YSZ layers. The BC prepared by EB-PVD is dense and homogeneous, which leads to a dense and hard 8YSZ with clustered slim columnar grains. The BC prepared by HVOF, however, is porous and inhomogeneous in microstructure and, as a result, the top ceramic layer is loose with low microhardness and clustered coarse columnar grains. |
| DOI : |
10.1007/s11998-007-9046-8 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9046-8.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3649 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 3 (09/2007) . - p. 335-340
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Microstructure and thermal cycling behavior of thermal barrier coating on near-a titanium alloy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 3 (09/2007)
