Failure behaviour of functionally gradient materials under thermal cycling conditions
Surface and Coatings Technology, cilt.174-175, ss.1101-1105, 2003 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 174-175
- Basım Tarihi: 2003
- Doi Numarası: 10.1016/s0257-8972(03)00408-0
- Dergi Adı: Surface and Coatings Technology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1101-1105
- Anahtar Kelimeler: Failure, FGM, Microhardness, Microstructure, Plasma spray, Thermal cycling
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Hayır
Özet
Functionally gradient coatings are coating systems, which are used to increase performances of high temperature components in the hot gas turbine section of gas turbine engines, diesel engines, in aerospace and aircraft applications. These coatings consist of a transition from the metallic bond layer to cermet and from cermet to the ceramic layer. Functionally gradient materials were applied on stainless steel substrates via an atmospheric plasma spray technique. The coating architecture was NiCrAl, 75% NiCrAl + 25% MgZrO3, 50% NiCrAl + 50% MgZrO3, 25% NiCrAl + 75% MgZrO3 and 100% MgZrO3 layers, respectively. The FGM samples were thermally cycled at temperature range of 47 and 600 °C for periods of 303 s and then characterised by optical microscopy, image analyser, SEM and XRD. Microhardness of the layers was measured using a standard microhardness tester. The obtained results are presented. © 2003 Elsevier Science B.V. All rights reserved.