| DOI | Trouver le DOI : https://doi.org/10.1016/j.surfcoat.2011.12.004 |
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| Auteur | Rechercher : Kim, D.J.1; Rechercher : Seo, D.Y.1; Rechercher : Huang, X.; Rechercher : Yang, Q.1; Rechercher : Kim, Y.-W. |
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| Affiliation | - Conseil national de recherches du Canada. Institut de recherche aérospatiale du CNRC
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| Format | Texte, Article |
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| Sujet | titanium aluminide; beta gamma alloys; NiCrAlY; plasma spray; powder metallurgy; cyclic oxidation |
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| Résumé | A new beta gamma TiAl–4Nb–3Mn alloy was synthesized by powder metallurgy (PM) and coated with NiCrAlY powder by Air Plasma Spray (APS). The cyclic oxidation behavior of the coated beta gamma alloy was investigated between room temperature and 1000 °C for up to 800 cycles. During cyclic oxidation testing, a TiN layer formed at the interface between NiCrAlY and TiAl–4Nb–3Mn and the thickness of the TiN layer increased with the number of cycles. The outward Ti diffusion also resulted in the formation of titanium oxides on the coating top surface after 630 cycles. Inward diffusion of Ni led to the formation of an inner diffusion zone containing NiAlTi and a mixture of NiAlTi + TiAl. Due to the spallation of coating scales on the circumferential surface, weight loss was observed after 120 cycles although both the top and bottom surfaces of the specimens remain in contact with the substrate until 800 cycles. Due to inward and outward diffusion, half of the NiCrAlY coating was consumed after 800 cycles suggesting the need for diffusion barrier coating at the interface between the NiCrAlY coating and the TiAl–4Nb–3Mn alloy. |
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| Date de publication | 2012-02 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Identificateur | S0257897211011947 |
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| Numéro NPARC | 21268729 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | dcf335d4-128b-46e2-b5fb-3fd2cb4ed981 |
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| Enregistrement créé | 2013-11-08 |
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| Enregistrement modifié | 2020-04-21 |
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