Author/Authors :
PARLAKYİĞİT, Abdullah Selim İstanbul Teknik Üniversitesi - Makine Fakültesi - Makine Mühendisliği Bölümü, Turkey , KARAOĞLANLI, Abdullah Cahit Bartın Üniversitesi - Mühendislik-Mimarlık Fakültesi - Metalurji ve Malzeme Mühendisliği Bölümü, Turkey , GÜLMEZ, Turgut İstanbul Teknik Üniversitesi - Makine Fakültesi - Makine Mühendisliği Bölümü, Turkey , TÜRK, Ahmet Sakarya Üniversitesi - Mühendislik-Mimarlık Fakültesi - Metalurji ve Malzeme Mühendisliği Bölümü, Turkey
Title Of Article :
Investigation of Microstructural Properties of Thermal Barrier Coating (TBC) System Consisting of YSZ Topcoat and NiCrAlY Bond Coat
Abstract :
Thermal barrier coatings (TBCs) are used in stationary and dynamic parts of gas turbines in order to protect main component from detrimental effect of hot gases and increasing thermal efficiency of system. A TBC system is typically consist of, a suitable substrate material, a ceramic top coat providing thermal insulation, a metallic bond coat protecting the substrate material against to oxidation and preventing thermal mismatch between the substrate and top-coat and, an oxide layer that starts with the coating process going on with growing under service conditions. In this study, yitriya stabilized zirconia (8YSZ; ZrO2-8Y2O3) topcoat deposited with APS (Atmospheric Plasma Spray) technique and NiCrAlY bond coat were deposited with HVOF (High Velocity Oxy-Fuel) technique. Microstructural properties, porosity rates and microhardness measurements of TBC system were conducted by using scanning electron microscope (SEM), microstructure analysis software and microhardness test equipment, respectively.
NaturalLanguageKeyword :
Thermal barrier coating (TBC) , YSZ , NiCrAlY , APS , HVOF , Microstructure
JournalTitle :
Afyon Kocatepe University Journal Of Science and Engineering
